Update Grammar for filename with optional password

docs/grammar.md

@@ -80,7 +80,7 @@ Short description:
 <span class="grammar-symbol">(</span><a href="#aws-sigv4-option">aws-sigv4-option</a><span class="grammar-symbol">|</span><a href="#ca-certificate-option">ca-certificate-option</a><span class="grammar-symbol">|</span><a href="#client-certificate-option">client-certificate-option</a><span class="grammar-symbol">|</span><a href="#client-key-option">client-key-option</a><span class="grammar-symbol">|</span><a href="#compressed-option">compressed-option</a><span class="grammar-symbol">|</span><a href="#connect-to-option">connect-to-option</a><span class="grammar-symbol">|</span><a href="#delay-option">delay-option</a><span class="grammar-symbol">|</span><a href="#follow-redirect-option">follow-redirect-option</a><span class="grammar-symbol">|</span><a href="#follow-redirect-trusted-option">follow-redirect-trusted-option</a><span class="grammar-symbol">|</span><a href="#http10-option">http10-option</a><span class="grammar-symbol">|</span><a href="#http11-option">http11-option</a><span class="grammar-symbol">|</span><a href="#http2-option">http2-option</a><span class="grammar-symbol">|</span><a href="#http3-option">http3-option</a><span class="grammar-symbol">|</span><a href="#insecure-option">insecure-option</a><span class="grammar-symbol">|</span><a href="#ipv4-option">ipv4-option</a><span class="grammar-symbol">|</span><a href="#ipv6-option">ipv6-option</a><span class="grammar-symbol">|</span><a href="#max-redirs-option">max-redirs-option</a><span class="grammar-symbol">|</span><a href="#netrc-option">netrc-option</a><span class="grammar-symbol">|</span><a href="#netrc-file-option">netrc-file-option</a><span class="grammar-symbol">|</span><a href="#netrc-optional-option">netrc-optional-option</a><span class="grammar-symbol">|</span><a href="#output-option">output-option</a><span class="grammar-symbol">|</span><a href="#path-as-is-option">path-as-is-option</a><span class="grammar-symbol">|</span><a href="#proxy-option">proxy-option</a><span class="grammar-symbol">|</span><a href="#resolve-option">resolve-option</a><span class="grammar-symbol">|</span><a href="#retry-option">retry-option</a><span class="grammar-symbol">|</span><a href="#retry-interval-option">retry-interval-option</a><span class="grammar-symbol">|</span><a href="#skip-option">skip-option</a><span class="grammar-symbol">|</span><a href="#unix-socket-option">unix-socket-option</a><span class="grammar-symbol">|</span><a href="#variable-option">variable-option</a><span class="grammar-symbol">|</span><a href="#verbose-option">verbose-option</a><span class="grammar-symbol">|</span><a href="#very-verbose-option">very-verbose-option</a><span class="grammar-symbol">)</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="aws-sigv4-option">aws-sigv4-option</span><span class="grammar-usedby">(used by <a href="#option">option</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">aws-sigv4</span>&nbsp;<span class="grammar-literal">:</span>&nbsp;<a href="#value-string">value-string</a>&nbsp;<a href="#lt">lt</a></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="ca-certificate-option">ca-certificate-option</span><span class="grammar-usedby">(used by <a href="#option">option</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">cacert</span>&nbsp;<span class="grammar-literal">:</span>&nbsp;<a href="#filename">filename</a>&nbsp;<a href="#lt">lt</a></div></div>
-<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="client-certificate-option">client-certificate-option</span><span class="grammar-usedby">(used by <a href="#option">option</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">cert</span>&nbsp;<span class="grammar-literal">:</span>&nbsp;<a href="#value-string">value-string</a>&nbsp;<a href="#lt">lt</a></div></div>
+<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="client-certificate-option">client-certificate-option</span><span class="grammar-usedby">(used by <a href="#option">option</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">cert</span>&nbsp;<span class="grammar-literal">:</span>&nbsp;<a href="#filename-password">filename-password</a>&nbsp;<a href="#lt">lt</a></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="client-key-option">client-key-option</span><span class="grammar-usedby">(used by <a href="#option">option</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">key</span>&nbsp;<span class="grammar-literal">:</span>&nbsp;<a href="#value-string">value-string</a>&nbsp;<a href="#lt">lt</a></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="compressed-option">compressed-option</span><span class="grammar-usedby">(used by <a href="#option">option</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">compressed</span>&nbsp;<span class="grammar-literal">:</span>&nbsp;<a href="#boolean-option">boolean-option</a>&nbsp;<a href="#lt">lt</a></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="connect-to-option">connect-to-option</span><span class="grammar-usedby">(used by <a href="#option">option</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">connect-to</span>&nbsp;<span class="grammar-literal">:</span>&nbsp;<a href="#value-string">value-string</a>&nbsp;<a href="#lt">lt</a></div></div>
@@ -213,7 +213,7 @@ Short description:
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="key-string-content">key-string-content</span><span class="grammar-usedby">(used by <a href="#key-string">key-string</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-symbol">(</span><a href="#key-string-text">key-string-text</a><span class="grammar-symbol">|</span><a href="#key-string-escaped-char">key-string-escaped-char</a><span class="grammar-symbol">)</span><span class="grammar-symbol">*</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="key-string-text">key-string-text</span><span class="grammar-usedby">(used by <a href="#key-string-content">key-string-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-symbol">(</span><a href="#alphanum">alphanum</a><span class="grammar-symbol">|</span><span class="grammar-literal">_</span><span class="grammar-symbol">|</span><span class="grammar-literal">-</span><span class="grammar-symbol">|</span><span class="grammar-literal">.</span><span class="grammar-symbol">|</span><span class="grammar-literal">[</span><span class="grammar-symbol">|</span><span class="grammar-literal">]</span><span class="grammar-symbol">|</span><span class="grammar-literal">@</span><span class="grammar-symbol">|</span><span class="grammar-literal">$</span><span class="grammar-symbol">)</span><span class="grammar-symbol">+</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="key-string-escaped-char">key-string-escaped-char</span><span class="grammar-usedby">(used by <a href="#key-string-content">key-string-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">\</span>&nbsp;<span class="grammar-symbol">(</span><span class="grammar-literal">#</span><span class="grammar-symbol">|</span><span class="grammar-literal">:</span><span class="grammar-symbol">|</span><span class="grammar-literal">\</span><span class="grammar-symbol">|</span><span class="grammar-literal">\b</span><span class="grammar-symbol">|</span><span class="grammar-literal">\f</span><span class="grammar-symbol">|</span><span class="grammar-literal">\n</span><span class="grammar-symbol">|</span><span class="grammar-literal">\r</span><span class="grammar-symbol">|</span><span class="grammar-literal">\t</span><span class="grammar-symbol">|</span><span class="grammar-literal">\u</span>&nbsp;<a href="#unicode-char">unicode-char</a><span class="grammar-symbol">)</span></div></div>
-<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="value-string">value-string</span><span class="grammar-usedby">(used by <a href="#request">request</a>,&nbsp;<a href="#key-value">key-value</a>,&nbsp;<a href="#aws-sigv4-option">aws-sigv4-option</a>,&nbsp;<a href="#client-certificate-option">client-certificate-option</a>,&nbsp;<a href="#client-key-option">client-key-option</a>,&nbsp;<a href="#connect-to-option">connect-to-option</a>,&nbsp;<a href="#netrc-file-option">netrc-file-option</a>,&nbsp;<a href="#output-option">output-option</a>,&nbsp;<a href="#proxy-option">proxy-option</a>,&nbsp;<a href="#resolve-option">resolve-option</a>,&nbsp;<a href="#unix-socket-option">unix-socket-option</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-symbol">(</span><a href="#value-string-content">value-string-content</a><span class="grammar-symbol">|</span><a href="#template">template</a><span class="grammar-symbol">)</span><span class="grammar-symbol">*</span></div></div>
+<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="value-string">value-string</span><span class="grammar-usedby">(used by <a href="#request">request</a>,&nbsp;<a href="#key-value">key-value</a>,&nbsp;<a href="#aws-sigv4-option">aws-sigv4-option</a>,&nbsp;<a href="#client-key-option">client-key-option</a>,&nbsp;<a href="#connect-to-option">connect-to-option</a>,&nbsp;<a href="#netrc-file-option">netrc-file-option</a>,&nbsp;<a href="#output-option">output-option</a>,&nbsp;<a href="#proxy-option">proxy-option</a>,&nbsp;<a href="#resolve-option">resolve-option</a>,&nbsp;<a href="#unix-socket-option">unix-socket-option</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-symbol">(</span><a href="#value-string-content">value-string-content</a><span class="grammar-symbol">|</span><a href="#template">template</a><span class="grammar-symbol">)</span><span class="grammar-symbol">*</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="value-string-content">value-string-content</span><span class="grammar-usedby">(used by <a href="#value-string">value-string</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-symbol">(</span><a href="#value-string-text">value-string-text</a><span class="grammar-symbol">|</span><a href="#value-string-escaped-char">value-string-escaped-char</a><span class="grammar-symbol">)</span><span class="grammar-symbol">*</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="value-string-text">value-string-text</span><span class="grammar-usedby">(used by <a href="#value-string-content">value-string-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-regex">~[#\n\\]+</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="value-string-escaped-char">value-string-escaped-char</span><span class="grammar-usedby">(used by <a href="#value-string-content">value-string-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">\</span>&nbsp;<span class="grammar-symbol">(</span><span class="grammar-literal">#</span><span class="grammar-symbol">|</span><span class="grammar-literal">\</span><span class="grammar-symbol">|</span><span class="grammar-literal">\b</span><span class="grammar-symbol">|</span><span class="grammar-literal">\f</span><span class="grammar-symbol">|</span><span class="grammar-literal">\n</span><span class="grammar-symbol">|</span><span class="grammar-literal">\r</span><span class="grammar-symbol">|</span><span class="grammar-literal">\t</span><span class="grammar-symbol">|</span><span class="grammar-literal">\u</span>&nbsp;<a href="#unicode-char">unicode-char</a><span class="grammar-symbol">)</span></div></div>
@@ -234,8 +234,12 @@ Short description:
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="multiline-string-escaped-char">multiline-string-escaped-char</span><span class="grammar-usedby">(used by <a href="#multiline-string-content">multiline-string-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">\</span>&nbsp;<span class="grammar-symbol">(</span><span class="grammar-literal">\</span><span class="grammar-symbol">|</span><span class="grammar-literal">b</span><span class="grammar-symbol">|</span><span class="grammar-literal">f</span><span class="grammar-symbol">|</span><span class="grammar-literal">n</span><span class="grammar-symbol">|</span><span class="grammar-literal">r</span><span class="grammar-symbol">|</span><span class="grammar-literal">t</span><span class="grammar-symbol">|</span><span class="grammar-literal">`</span><span class="grammar-symbol">|</span><span class="grammar-literal">u</span>&nbsp;<a href="#unicode-char">unicode-char</a><span class="grammar-symbol">)</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="filename">filename</span><span class="grammar-usedby">(used by <a href="#file-value">file-value</a>,&nbsp;<a href="#ca-certificate-option">ca-certificate-option</a>,&nbsp;<a href="#oneline-file">oneline-file</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-symbol">(</span><a href="#filename-content">filename-content</a><span class="grammar-symbol">|</span><a href="#template">template</a><span class="grammar-symbol">)</span><span class="grammar-symbol">*</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="filename-content">filename-content</span><span class="grammar-usedby">(used by <a href="#filename">filename</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-symbol">(</span><a href="#filename-text">filename-text</a><span class="grammar-symbol">|</span><a href="#filename-escaped-char">filename-escaped-char</a><span class="grammar-symbol">)</span><span class="grammar-symbol">*</span></div></div>
-<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="filename-text">filename-text</span><span class="grammar-usedby">(used by <a href="#filename-content">filename-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-regex">~[#; \n\\]+</span></div></div>
-<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="filename-escaped-char">filename-escaped-char</span><span class="grammar-usedby">(used by <a href="#filename-content">filename-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">\</span>&nbsp;<span class="grammar-symbol">(</span><span class="grammar-literal">;</span><span class="grammar-symbol">|</span><span class="grammar-literal">#</span><span class="grammar-symbol">|</span><span class="grammar-regex">[ ]</span><span class="grammar-symbol">)</span></div></div>
+<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="filename-text">filename-text</span><span class="grammar-usedby">(used by <a href="#filename-content">filename-content</a>,&nbsp;<a href="#filename-password-content">filename-password-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-regex">~[#; \n\\]+</span></div></div>
+<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="filename-escaped-char">filename-escaped-char</span><span class="grammar-usedby">(used by <a href="#filename-content">filename-content</a>,&nbsp;<a href="#filename-password-content">filename-password-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">\</span>&nbsp;<span class="grammar-symbol">(</span><span class="grammar-literal">;</span><span class="grammar-symbol">|</span><span class="grammar-literal">#</span><span class="grammar-symbol">|</span><span class="grammar-regex">[ ]</span><span class="grammar-symbol">)</span></div></div>
+<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="filename-password">filename-password</span><span class="grammar-usedby">(used by <a href="#client-certificate-option">client-certificate-option</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-symbol">(</span><a href="#filename-password-content">filename-password-content</a><span class="grammar-symbol">|</span><a href="#template">template</a><span class="grammar-symbol">)</span><span class="grammar-symbol">*</span></div></div>
+<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="filename-password-content">filename-password-content</span><span class="grammar-usedby">(used by <a href="#filename-password">filename-password</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-symbol">(</span><a href="#filename-text">filename-text</a><span class="grammar-symbol">|</span><a href="#filename-escaped-char">filename-escaped-char</a><span class="grammar-symbol">|</span><span class="grammar-literal">:</span><span class="grammar-symbol">|</span><a href="#password-text">password-text</a><span class="grammar-symbol">|</span><a href="#password-escaped-char">password-escaped-char</a><span class="grammar-symbol">)</span><span class="grammar-symbol">*</span></div></div>
+<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="password-text">password-text</span><span class="grammar-usedby">(used by <a href="#filename-password-content">filename-password-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-regex">~[#; \n\\]+</span></div></div>
+<div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="password-escaped-char">password-escaped-char</span><span class="grammar-usedby">(used by <a href="#filename-password-content">filename-password-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">\</span>&nbsp;<span class="grammar-symbol">(</span><span class="grammar-literal">;</span><span class="grammar-symbol">|</span><span class="grammar-literal">#</span><span class="grammar-symbol">|</span><span class="grammar-regex">[ ]</span><span class="grammar-symbol">)</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="unicode-char">unicode-char</span><span class="grammar-usedby">(used by <a href="#quoted-string-escaped-char">quoted-string-escaped-char</a>,&nbsp;<a href="#key-string-escaped-char">key-string-escaped-char</a>,&nbsp;<a href="#value-string-escaped-char">value-string-escaped-char</a>,&nbsp;<a href="#oneline-string-escaped-char">oneline-string-escaped-char</a>,&nbsp;<a href="#multiline-string-escaped-char">multiline-string-escaped-char</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">{</span>&nbsp;<a href="#hexdigit">hexdigit</a><span class="grammar-symbol">+</span>&nbsp;<span class="grammar-literal">}</span></div></div>
 </div><div class="grammar-ruleset"><h3 id="json">JSON</h3><div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="json-value">json-value</span><span class="grammar-usedby">(used by <a href="#bytes">bytes</a>,&nbsp;<a href="#json-key-value">json-key-value</a>,&nbsp;<a href="#json-array">json-array</a>)</span></div><div class="grammar-rule-expression">&nbsp;<a href="#template">template</a><br>
 <span class="grammar-symbol">|</span><a href="#json-object">json-object</a><br>
@@ -252,7 +256,7 @@ Short description:
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="json-string-text">json-string-text</span><span class="grammar-usedby">(used by <a href="#json-string-content">json-string-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-regex">~["\\]</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="json-string-escaped-char">json-string-escaped-char</span><span class="grammar-usedby">(used by <a href="#json-string-content">json-string-content</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">\</span>&nbsp;<span class="grammar-symbol">(</span><span class="grammar-literal">"</span><span class="grammar-symbol">|</span><span class="grammar-literal">\</span><span class="grammar-symbol">|</span><span class="grammar-literal">b</span><span class="grammar-symbol">|</span><span class="grammar-literal">f</span><span class="grammar-symbol">|</span><span class="grammar-literal">n</span><span class="grammar-symbol">|</span><span class="grammar-literal">r</span><span class="grammar-symbol">|</span><span class="grammar-literal">t</span><span class="grammar-symbol">|</span><span class="grammar-literal">u</span>&nbsp;<a href="#hexdigit">hexdigit</a>&nbsp;<a href="#hexdigit">hexdigit</a>&nbsp;<a href="#hexdigit">hexdigit</a>&nbsp;<a href="#hexdigit">hexdigit</a><span class="grammar-symbol">)</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="json-number">json-number</span><span class="grammar-usedby">(used by <a href="#json-value">json-value</a>)</span></div><div class="grammar-rule-expression"><a href="#integer">integer</a>&nbsp;<a href="#fraction">fraction</a><span class="grammar-symbol">?</span>&nbsp;<a href="#exponent">exponent</a><span class="grammar-symbol">?</span></div></div>
-</div><div class="grammar-ruleset"><h3 id="template-expression">Template / Expression</h3><div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="template">template</span><span class="grammar-usedby">(used by <a href="#boolean-option">boolean-option</a>,&nbsp;<a href="#integer-option">integer-option</a>,&nbsp;<a href="#predicate-value">predicate-value</a>,&nbsp;<a href="#quoted-string">quoted-string</a>,&nbsp;<a href="#key-string">key-string</a>,&nbsp;<a href="#value-string">value-string</a>,&nbsp;<a href="#oneline-string">oneline-string</a>,&nbsp;<a href="#multiline-string">multiline-string</a>,&nbsp;<a href="#filename">filename</a>,&nbsp;<a href="#json-value">json-value</a>,&nbsp;<a href="#json-string">json-string</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">{{</span>&nbsp;<a href="#expr">expr</a>&nbsp;<span class="grammar-literal">}}</span></div></div>
+</div><div class="grammar-ruleset"><h3 id="template-expression">Template / Expression</h3><div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="template">template</span><span class="grammar-usedby">(used by <a href="#boolean-option">boolean-option</a>,&nbsp;<a href="#integer-option">integer-option</a>,&nbsp;<a href="#predicate-value">predicate-value</a>,&nbsp;<a href="#quoted-string">quoted-string</a>,&nbsp;<a href="#key-string">key-string</a>,&nbsp;<a href="#value-string">value-string</a>,&nbsp;<a href="#oneline-string">oneline-string</a>,&nbsp;<a href="#multiline-string">multiline-string</a>,&nbsp;<a href="#filename">filename</a>,&nbsp;<a href="#filename-password">filename-password</a>,&nbsp;<a href="#json-value">json-value</a>,&nbsp;<a href="#json-string">json-string</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-literal">{{</span>&nbsp;<a href="#expr">expr</a>&nbsp;<span class="grammar-literal">}}</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="expr">expr</span><span class="grammar-usedby">(used by <a href="#template">template</a>)</span></div><div class="grammar-rule-expression"><a href="#variable-name">variable-name</a>&nbsp;<span class="grammar-symbol">(</span><a href="#sp">sp</a>&nbsp;<a href="#filter">filter</a><span class="grammar-symbol">)</span><span class="grammar-symbol">*</span></div></div>
 <div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="variable-name">variable-name</span><span class="grammar-usedby">(used by <a href="#variable-definition">variable-definition</a>,&nbsp;<a href="#expr">expr</a>)</span></div><div class="grammar-rule-expression"><span class="grammar-regex">[A-Za-z]</span>&nbsp;<span class="grammar-regex">[A-Za-z_-0-9]*</span></div></div>
 </div><div class="grammar-ruleset"><h3 id="filter">Filter</h3><div class="grammar-rule"><div class="grammar-rule-declaration"><span class="grammar-rule-id" id="filter">filter</span><span class="grammar-usedby">(used by <a href="#capture">capture</a>,&nbsp;<a href="#assert">assert</a>,&nbsp;<a href="#expr">expr</a>)</span></div><div class="grammar-rule-expression">&nbsp;<a href="#count-filter">count-filter</a><br>

docs/spec/grammar/hurl.grammar

@@ -153,7 +153,7 @@ aws-sigv4-option: "aws-sigv4" ":" value-string lt
 
 ca-certificate-option: "cacert" ":" filename lt
 
-client-certificate-option: "cert" ":" value-string lt
+client-certificate-option: "cert" ":" filename-password lt
 
 client-key-option: "key" ":" value-string lt
 
@@ -429,11 +429,19 @@ filename: (filename-content | template)*
 
 filename-content: (filename-text | filename-escaped-char)*
 
-filename-text: ~[#; \n\\]+
+filename-text: ~[#;{} \n\\]+
 
-filename-escaped-char: "\\" (";" | "#" | [ ])
+filename-escaped-char: "\\" ( "\\" | "b" | "f" | "n" | "r" | "t" | "#" | ";"| " " | "{" | "}" | "u" unicode-char)
 
 
+filename-password: (filename-password-content | template)*
+
+filename-password-content: (filename-password-text | filename-password-escaped-char)*
+
+filename-password-text: ~[#;{} \n\\]+
+
+filename-password-escaped-char: "\\" ( "\\" | "b" | "f" | "n" | "r" | "t" | "#" | ";" | " "  | "{" | "}" | "u" unicode-char)
+
 unicode-char: "{" hexdigit+ "}"