Adjust regex pattern for match file names in Gecko-style traces

The pattern for Gecko-style traces can match both URLs that start with a protocol and also local file paths when running scripts in JavaScriptCore. Allow files to start with any non-space character which covers periods, hyphens, and underscores for example.

lib/stacktrace-parser.js

@@ -9,7 +9,7 @@ var StackTraceParser = {
    */
   parse: function(stackString) {
     var chrome = /^\s*at (?:(?:(?:Anonymous function)?|((?:\[object object\])?\S+(?: \[as \S+\])?)) )?\(?((?:file|http|https):.*?):(\d+)(?::(\d+))?\)?\s*$/i,
-        gecko = /^(?:\s*(\S*)(?:\((.*?)\))?@)?((?:\w).*?):(\d+)(?::(\d+))?\s*$/i,
+        gecko = /^(?:\s*(\S*)(?:\((.*?)\))?@)?(\S.*?):(\d+)(?::(\d+))?\s*$/i,
         node  = /^\s*at (?:((?:\[object object\])?\S+(?: \[as \S+\])?) )?\(?(.*?):(\d+)(?::(\d+))?\)?\s*$/i,
         lines = stackString.split('\n'),
         stack = [],