From 916faf0a486fb540273629ef6c80d1087d1fd4ae Mon Sep 17 00:00:00 2001
From: Mihai Bazon <mihai@bazon.net>
Date: Wed, 6 Feb 2013 11:57:59 +0200
Subject: [PATCH] Force space after literal regexp when used in "instanceof" or
 "in"

Close #118
---
 lib/output.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/output.js b/lib/output.js
index b33bc63408c..42b3aad9279 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -1081,6 +1081,9 @@ function OutputStream(options) {
         if (output.option("ascii_only"))
             str = output.to_ascii(str);
         output.print(str);
+        var p = output.parent();
+        if (p instanceof AST_Binary && /^in/.test(p.operator) && p.left === self)
+            output.print(" ");
     });
 
     function force_statement(stat, output) {