From d15edf735abad9e15e858e4338bf8cf36c0c5b36 Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Tue, 22 Oct 2019 08:24:32 +0100
Subject: [PATCH] extend/string: use unless to fix style.

---
 Library/Homebrew/extend/string.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Library/Homebrew/extend/string.rb b/Library/Homebrew/extend/string.rb
index 304c6cc807..fae54878e4 100644
--- a/Library/Homebrew/extend/string.rb
+++ b/Library/Homebrew/extend/string.rb
@@ -50,7 +50,7 @@ module StringInreplaceExtension
   def remove_make_var!(flags)
     Array(flags).each do |flag|
       # Also remove trailing \n, if present.
-      if !gsub!(/^#{Regexp.escape(flag)}[ \t]*[\\?\+\:\!]?=.*$\n?/, "", false)
+      unless gsub!(/^#{Regexp.escape(flag)}[ \t]*[\\?\+\:\!]?=.*$\n?/, "", false)
         errors << "expected to remove #{flag.inspect}"
       end
     end