Fix variable highlighting in Shell Script

CHANGELOG.md

@@ -8,6 +8,8 @@ develop
 ### Improvements
 
 - Increase the number of significant digits in file size display.
+- Update Shell Script syntax style:
+    - Fix variable highlight with `_`.
 - [beta] Disable “Balance brackets and quotes” option by default.
 - [beta] Update “General” pane layout.
 

CotEditor/CotEditor.help/Contents/Resources/en.lproj/pgs/releasenotes.html

@@ -75,6 +75,10 @@
 	<li>Improve character compatibility check.</li>
 	<li>Better error message on file opening.</li>
 	<li>Increase the number of significant digits in file size display.</li>
+	<li>Update Shell Script syntax style:
+	<ul>
+		<li>Fix variable highlight with <code>_</code>.</li>
+	</ul></li>
 	<li>Take a safety measure for in case the key binding setting file is corrupt.</li>
 	<li>Truncate outline label in the navigation bar by appending ellipsis if it overflows.</li>
 	<li>Move some options position within “General” pane and “Edit” pane in preferences window.</li>

CotEditor/CotEditor.help/Contents/Resources/ja.lproj/pgs/releasenotes.html

@@ -75,6 +75,10 @@
 	<li>非互換文字チェックを改良</li>
 	<li>ファイルオープン時のエラーメッセージを改良</li>
 	<li>ファイルサイズ表示の有効桁数を増加</li>
+	<li>Shell Script シンタックス定義を更新
+	<ul>
+		<li><code>_</code> を含む変数のハイライトを修正</li>
+	</ul></li>
 	<li>キーバインド設定ファイルが壊れているときの安全対策を追加</li>
 	<li>アウトラインメニューの項目ラベルが表示スペースから溢れるとき、三点リーダで省略</li>
 	<li>一部の設定項目を「編集」ペインと「一般」ペイン間で移動</li>

CotEditor/Syntaxes/Shell Script.yaml

@@ -17,9 +17,9 @@ interpreters:
 metadata:
   author: "1024jp"
   distributionURL: "http://coteditor.com"
-  version: "3.1.0"
+  version: "3.2.0"
   license: "Same as CotEditor"
-  lastModified: "2015-11-07"
+  lastModified: "2016-02-04"
 keywords:
 - beginString: "break"
 - beginString: "breaksw"
@@ -225,13 +225,13 @@ commands:
 - beginString: "zip"
 - beginString: "zsh"
 variables:
-- beginString: "\\$\\{?[a-z][a-z0-9]*\\}?"
+- beginString: "\\$\\{?[_a-z][_a-z0-9]*\\}?"
   regularExpression: true
   ignoreCase: true
-- beginString: "\\b[a-z][a-z0-9]*(?=\\=)"
+- beginString: "\\b[_a-z][_a-z0-9]*(?=\\=)"
   regularExpression: true
   ignoreCase: true
-- beginString: "\\b(?<=for(each)?) +[a-z][a-z0-9]*"
+- beginString: "\\b(?<=for(each)?) +[_a-z][_a-z0-9]*"
   regularExpression: true
   ignoreCase: true
 values: