make [ a whitespace character in scripts (Fixes #2126)

components/compiler/scanner.cpp

@@ -512,7 +512,8 @@ namespace Compiler
 
     bool Scanner::isWhitespace (char c)
     {
-        return c==' ' || c=='\t';
+        return c==' ' || c=='\t'
+            || c=='['; ///< \todo disable this when doing more strict compiling
     }
 
     // constructor