disabling javascriptlint's 'test for equality mistyped as assignment', because it's not relevant to coffeescript.

extras/jsl.conf

@@ -2,7 +2,7 @@
 
 +no_return_value              # function {0} does not always return a value
 +duplicate_formal             # duplicate formal argument {0}
-+equal_as_assign              # test for equality (==) mistyped as assignment (=)?{0}
+-equal_as_assign              # test for equality (==) mistyped as assignment (=)?{0}
 +var_hides_arg                # variable {0} hides argument
 +redeclared_var               # redeclaration of {0} {1}
 +anon_no_return_value         # anonymous function does not always return a value

lib/lexer.js

@@ -390,7 +390,7 @@
     };
     Lexer.prototype.sanitizeHeredoc = function(doc, options) {
       var _d, attempt, indent, match;
-      while ((match = HEREDOC_INDENT.exec(doc))) {
+      while (match = HEREDOC_INDENT.exec(doc)) {
         attempt = (typeof (_d = match[2]) !== "undefined" && _d !== null) ? match[2] : match[3];
         if (!indent || attempt.length < indent.length) {
           indent = attempt;

src/lexer.coffee

@@ -320,7 +320,7 @@ exports.Lexer = class Lexer
   # Sanitize a heredoc or herecomment by escaping internal double quotes and
   # erasing all external indentation on the left-hand side.
   sanitizeHeredoc: (doc, options) ->
-    while (match = HEREDOC_INDENT.exec(doc))
+    while match = HEREDOC_INDENT.exec(doc)
       attempt = if match[2]? then match[2] else match[3]
       indent = attempt if not indent or attempt.length < indent.length
     doc = doc.replace(new RegExp("^" +indent, 'gm'), '')