Allow spaces between a function name and args.

Author: nwronski

CHANGELOG.md

@@ -2,6 +2,12 @@
 All notable changes to this project will be documented in this file.
 
 ## [Unreleased][unreleased]
+### Fixed
+- Allow spaces between a function name and the argument list
+  ``` sql
+  SELECT COUNT (*)
+  FROM hats;
+  ```
 
 ## [v0.14.3] - 2016-03-28
 ### Fixed

src/grammar.pegjs

@@ -537,7 +537,7 @@ expression_list_rest
   { return e; }
 
 function_call "Function Call"
-  = n:( name_unquoted ) sym_popen a:( function_call_args )? o sym_pclose
+  = n:( name_unquoted ) o sym_popen a:( function_call_args )? o sym_pclose
   {
     return util.extend({
       'type': 'function',

test/sql/functions/function-mixed-args.sql

@@ -1 +1 @@
-SELECT MYFUNC(col, 1.2, 'str') AS "Super Func"
+SELECT MYFUNC (col, 1.2, 'str') AS "Super Func"