rc filetype: add trim-indent hooks to all languages that have indent hooks

An indent hook automatically adds whitespace, so it seems prudent to
add the hook to remove unwanted whitespace again. This is what we do
in most languages already.

rc/filetype/coq.kak

@@ -11,6 +11,7 @@ hook global BufCreate .*\.v %{
 
 hook global WinSetOption filetype=coq %{
     require-module coq
+    hook window ModeChange pop:insert:.* -group coq-trim-indent coq-trim-indent
     hook window InsertChar \n -group coq-indent coq-copy-indent-on-newline
 
     set-option window static_words %opt{coq_static_words}
@@ -115,4 +116,12 @@ define-command -hidden coq-copy-indent-on-newline %{
     }
 }
 
+define-command -hidden coq-trim-indent %{
+    evaluate-commands -no-hooks -draft -itersel %{
+        execute-keys <a-x>
+        # remove trailing white spaces
+        try %{ execute-keys -draft s \h + $ <ret> d }
+    }
+}
+
 }

rc/filetype/elvish.kak

@@ -7,6 +7,7 @@ hook global BufCreate .*\.elv %{
 hook global WinSetOption filetype=elvish %<
     require-module elvish
 
+    hook window ModeChange pop:insert:.* -group elvish-trim-indent elvish-trim-indent
     hook window InsertChar \n -group elvish-insert elvish-indent
     hook window InsertChar [\]})] -group elvish-insert elvish-deindent
     hook -once -always window WinSetOption filetype=.* %{ remove-hooks window elvish-.+ }
@@ -36,6 +37,14 @@ add-highlighter shared/elvish/code/keyword_block regex \}\h+(elif|else|except|fi
 
 add-highlighter shared/elvish/code/metachar regex [*?|&\;<>()[\]{}] 0:operator
 
+define-command -hidden elvish-trim-indent %{
+    evaluate-commands -no-hooks -draft -itersel %{
+        execute-keys <a-x>
+        # remove trailing white spaces
+        try %{ execute-keys -draft s \h + $ <ret> d }
+    }
+}
+
 define-command -hidden elvish-indent %< evaluate-commands -draft -itersel %<
     execute-keys <semicolon>
     try %<

rc/filetype/fsharp.kak

@@ -15,6 +15,7 @@ hook global WinSetOption filetype=fsharp %{
     require-module fsharp
 
     # indent on newline
+    hook window ModeChange pop:insert:.* -group fsharp-trim-indent fsharp-trim-indent
     hook window InsertChar \n -group fsharp-insert fsharp-insert-on-new-line
     hook window InsertChar \n -group fsharp-indent fsharp-indent-on-new-line
 
@@ -125,6 +126,14 @@ add-highlighter shared/fsharp/code/ regex "\B(\(\))\B" 0:value
 # Commands
 # ‾‾‾‾‾‾‾‾
 
+define-command -hidden fsharp-trim-indent %{
+    evaluate-commands -no-hooks -draft -itersel %{
+        execute-keys <a-x>
+        # remove trailing white spaces
+        try %{ execute-keys -draft s \h + $ <ret> d }
+    }
+}
+
 define-command -hidden fsharp-insert-on-new-line %{
     evaluate-commands -draft -itersel %{
         # copy // comments prefix and following white spaces

rc/filetype/just.kak

@@ -8,6 +8,7 @@ hook global BufCreate .*/?[jJ]ustfile %{
 hook global WinSetOption filetype=justfile %{
     require-module justfile
 
+    hook window ModeChange pop:insert:.* -group justfile-trim-indent justfile-trim-indent
     hook window InsertChar \n -group justfile-indent just-indent-on-new-line
     hook -once -always window WinSetOption filetype=.* %{ remove-hooks window justfile-.+ }
 }
@@ -23,6 +24,14 @@ provide-module justfile %{
 # Indentation
 # ‾‾‾‾‾‾‾‾‾‾‾
 
+define-command -hidden justfile-trim-indent %{
+    evaluate-commands -no-hooks -draft -itersel %{
+        execute-keys <a-x>
+        # remove trailing white spaces
+        try %{ execute-keys -draft s \h + $ <ret> d }
+    }
+}
+
 define-command -hidden just-indent-on-new-line %{
      evaluate-commands -draft -itersel %{
         # preserve previous line indent

rc/filetype/makefile.kak

@@ -13,6 +13,7 @@ hook global WinSetOption filetype=makefile %{
 
     set-option window static_words %opt{makefile_static_words}
 
+    hook window ModeChange pop:insert:.* -group makefile-trim-indent makefile-trim-indent
     hook window InsertChar \n -group makefile-indent makefile-indent-on-new-line
     hook -once -always window WinSetOption filetype=.* %{ remove-hooks window makefile-.+ }
 }
@@ -50,6 +51,14 @@ evaluate-commands %sh{
 # Commands
 # ‾‾‾‾‾‾‾‾
 
+define-command -hidden makefile-trim-indent %{
+    evaluate-commands -no-hooks -draft -itersel %{
+        execute-keys <a-x>
+        # remove trailing white spaces
+        try %{ execute-keys -draft s \h + $ <ret> d }
+    }
+}
+
 define-command -hidden makefile-indent-on-new-line %{
     evaluate-commands -draft -itersel %{
         # preserve previous line indent

rc/filetype/markdown.kak

@@ -14,6 +14,7 @@ hook global BufCreate .*[.](markdown|md|mkd) %{
 hook global WinSetOption filetype=markdown %{
     require-module markdown
 
+    hook window ModeChange pop:insert:.* -group markdown-trim-indent markdown-trim-indent
     hook window InsertChar \n -group markdown-insert markdown-insert-on-new-line
     hook window InsertChar \n -group markdown-indent markdown-indent-on-new-line
     hook -once -always window WinSetOption filetype=.* %{ remove-hooks window markdown-.+ }
@@ -99,6 +100,14 @@ add-highlighter shared/markdown/inline/text/ regex "\H( {2,})$" 1:+r@meta
 # Commands
 # ‾‾‾‾‾‾‾‾
 
+define-command -hidden markdown-trim-indent %{
+    evaluate-commands -no-hooks -draft -itersel %{
+        execute-keys <a-x>
+        # remove trailing white spaces
+        try %{ execute-keys -draft s \h + $ <ret> d }
+    }
+}
+
 define-command -hidden markdown-insert-on-new-line %{
     try %{ execute-keys -draft -itersel k <a-x> s ^\h*\K((>\h*)+([*+-]\h)?|(>\h*)*[*+-]\h)\h* <ret> y gh j P }
 }

rc/filetype/pascal.kak

@@ -14,6 +14,7 @@ hook global BufCreate .*\.(lpr|lfm)$ %{
 
 hook global WinSetOption filetype=((free|object)?pascal|delphi) %[
     require-module pascal
+    hook window ModeChange pop:insert:.* -group pascal-trim-indent pascal-trim-indent
     hook window InsertChar \n -group pascal-indent pascal-indent-on-new-line
     hook -once -always window WinSetOption filetype=.* %{ remove-hooks window pascal-.+ }
     set-option window static_words %opt{static_words}
@@ -189,6 +190,14 @@ EOF
     done
 ¶
 
+define-command -hidden pascal-trim-indent %{
+    evaluate-commands -no-hooks -draft -itersel %{
+        execute-keys <a-x>
+        # remove trailing white spaces
+        try %{ execute-keys -draft s \h + $ <ret> d }
+    }
+}
+
 define-command -hidden pascal-indent-on-new-line %{
     evaluate-commands -no-hooks -draft -itersel %{
         # preserve previous line indent

rc/filetype/protobuf.kak

@@ -15,6 +15,7 @@ hook global WinSetOption filetype=protobuf %[
 
     set-option window static_words %opt{protobuf_static_words}
 
+    hook window ModeChange pop:insert:.* -group protobuf-trim-indent protobuf-trim-indent
     hook -group protobuf-indent window InsertChar \n protobuf-indent-on-newline
     hook -group protobuf-indent window InsertChar \{ protobuf-indent-on-opening-curly-brace
     hook -group protobuf-indent window InsertChar \} protobuf-indent-on-closing-curly-brace
@@ -66,6 +67,14 @@ evaluate-commands %sh{
 # Commands
 # ‾‾‾‾‾‾‾‾
 
+define-command -hidden protobuf-trim-indent %{
+    evaluate-commands -no-hooks -draft -itersel %{
+        execute-keys <a-x>
+        # remove trailing white spaces
+        try %{ execute-keys -draft s \h + $ <ret> d }
+    }
+}
+
 define-command -hidden protobuf-indent-on-newline %~
     evaluate-commands -draft -itersel %[
         # preserve previous line indent

rc/filetype/taskpaper.kak

@@ -14,6 +14,7 @@ hook global BufCreate .*\.taskpaper %{
 hook global WinSetOption filetype=taskpaper %{
     require-module taskpaper
 
+    hook window ModeChange pop:insert:.* -group taskpaper-trim-indent taskpaper-trim-indent
     hook window InsertChar \n -group taskpaper-indent taskpaper-indent-on-new-line
     hook -once -always window WinSetOption filetype=.* %{ remove-hooks window taskpaper-.+ }
 }
@@ -40,6 +41,14 @@ add-highlighter shared/taskpaper/ regex (([a-z]+://\S+)|((mailto:)[\w+-]+@\S+))
 # Commands
 # ‾‾‾‾‾‾‾‾
 
+define-command -hidden taskpaper-trim-indent %{
+    evaluate-commands -no-hooks -draft -itersel %{
+        execute-keys <a-x>
+        # remove trailing white spaces
+        try %{ execute-keys -draft s \h + $ <ret> d }
+    }
+}
+
 define-command -hidden taskpaper-indent-on-new-line %{
     evaluate-commands -draft -itersel %{
         # preserve previous line indent