Tweak use of with_env

- Use it in more places where it saves code
- Allow using symbolic keys for a cleaner interface
- Use `HOMEBREW_GEM_*` instead of `GEM_OLD_*`

1 files changed, 1 insertions, 1 deletions

diff --git a/Library/Homebrew/extend/fileutils.rb b/Library/Homebrew/extend/fileutils.rb
index 34ef3869f..6286e48c0 100644
--- a/Library/Homebrew/extend/fileutils.rb
+++ b/Library/Homebrew/extend/fileutils.rb
@@ -114,7 +114,7 @@ module FileUtils
 
     if superenv?
       make_name = File.basename(make_path)
-      with_env "HOMEBREW_MAKE" => make_name do
+      with_env(HOMEBREW_MAKE: make_name) do
         system "make", *args
       end
     else