fix(commit): remove parentheses when there is no scope present

Author: Rayman

index.js

@@ -88,8 +88,12 @@ module.exports = {
         width: maxLineWidth
       };
 
+      // parentheses are only needed when a scope is present
+      var scope = answers.scope.trim();
+      scope = scope ? '(' + answers.scope.trim() + ')' : '';
+
       // Hard limit this line
-      var head = (answers.type + '(' + answers.scope.trim() + '): ' + answers.subject.trim()).slice(0, maxLineWidth);
+      var head = (answers.type + scope + ': ' + answers.subject.trim()).slice(0, maxLineWidth);
 
       // Wrap these lines at 100 characters
       var body = wrap(answers.body, wrapOptions);