From c4ba06c9fcec5d6f07bae63a16cc619116f5e43f Mon Sep 17 00:00:00 2001
From: Steven Peters <scpeters@openrobotics.org>
Date: Wed, 12 Sep 2018 14:01:03 -0700
Subject: [PATCH] dev-cmd/bottle: fix --keep-old with --root-url

Don't strip the : from root_url when using --keep-old.
Closes #4554.
---
 Library/Homebrew/dev-cmd/bottle.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/dev-cmd/bottle.rb b/Library/Homebrew/dev-cmd/bottle.rb
index 5d9f28154c..c27d78f6d8 100644
--- a/Library/Homebrew/dev-cmd/bottle.rb
+++ b/Library/Homebrew/dev-cmd/bottle.rb
@@ -448,7 +448,8 @@ module Homebrew
                 valid_key = %w[root_url prefix cellar rebuild sha1 sha256].include? key
                 next unless valid_key
 
-                old_value = old_value_original.to_s.delete ":'\""
+                old_value = old_value_original.to_s.delete "'\""
+                old_value = old_value.to_s.delete ":" if key != "root_url"
                 tag = tag.to_s.delete ":"
 
                 unless tag.empty?