Removed useless rules, added support for do() syntax

lib/ace/mode/praat_highlight_rules.js

@@ -15,8 +15,6 @@ var PraatHighlightRules = function() {
         "assert"
     );
 
-//     var buildinConstants = ("ARGV|ENV|INC|SIG");
-
     var predefinedVariables = (
         "macintosh|windows|unix|" +
         "praatVersion|praatVersion\\$" +
@@ -91,18 +89,6 @@ var PraatHighlightRules = function() {
         "ResultsMFC|EEG|ERPTier|ERP|KNN|FeatureWeights"
     );
     
-    var keywordMapper = this.createKeywordMapper({
-        "keyword": keywords,
-//         "constant.language": buildinConstants,
-        "support.function": functions
-    }, "identifier");
-    
-    var inlineIf = this.createKeywordMapper({
-        "keyword": "(if|then|else|fi)",
-//         "constant.language": buildinConstants,
-        "support.function": functions
-    }, "identifier");
-
     // regexp must not have capturing parentheses. Use (?:) instead.
     // regexps are ordered -> the first match is used
 
@@ -120,6 +106,9 @@ var PraatHighlightRules = function() {
             }, {
                 token : ["text", "keyword", "text", "keyword"],
                 regex : /^(\s*)(?:(demo)(\s+))?(10|12|14|16|24)$/
+            }, {
+                token : ["text", "support.function", "text"],
+                regex : /(\s*)(do\$?)(\s*:\s*|\s*\(\s*)/
             }, {
             // Is this rule necessary?
             //     token : ["text", "keyword"],
@@ -151,7 +140,7 @@ var PraatHighlightRules = function() {
                 regex : /"[^"]*$/,
                 next : "brokenstring"
             }, {
-                token : ["text", "keyword", "text", "entity.name.section"], // multi line string start
+                token : ["text", "keyword", "text", "entity.name.section"],
                 regex : /(^\s*)(\bform\b)(\s+)(.*)/,
                 next : "form"
             }, {