From de4dd638eb5a1aec589ba8862891b8e57911f679 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Sat, 16 Dec 2017 01:25:27 +0100
Subject: [PATCH] style: Fix grid line serialization to avoid redundant
 spacing.

This fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1425227.
---
 components/style/values/generics/grid.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/components/style/values/generics/grid.rs b/components/style/values/generics/grid.rs
index bd0dc82507f..95e1f1d500e 100644
--- a/components/style/values/generics/grid.rs
+++ b/components/style/values/generics/grid.rs
@@ -59,12 +59,16 @@ where
         }
 
         if let Some(ref i) = self.line_num {
-            dest.write_str(" ")?;
+            if self.is_span {
+                dest.write_str(" ")?;
+            }
             i.to_css(dest)?;
         }
 
         if let Some(ref s) = self.ident {
-            dest.write_str(" ")?;
+            if self.is_span || self.line_num.is_some() {
+                dest.write_str(" ")?;
+            }
             s.to_css(dest)?;
         }