From d4bf413956c5e70dfe42cbca062fcb349ecdff5d Mon Sep 17 00:00:00 2001
From: topecongiro <seuchida@gmail.com>
Date: Sat, 5 Aug 2017 15:23:23 +0900
Subject: [PATCH] Do not add missing snippet between arms if it's just spaces

---
 src/expr.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/expr.rs b/src/expr.rs
index a847733e7bd..d276bcc2951 100644
--- a/src/expr.rs
+++ b/src/expr.rs
@@ -1615,7 +1615,9 @@ fn rewrite_match_arms(
             arm_shape,
             &arm_indent_str,
         ));
-        result.push_str(&comment);
+        if !comment.chars().all(|c| c == ' ') {
+            result.push_str(&comment);
+        }
         result.push('\n');
         result.push_str(&arm_indent_str);