Merge pull request #6995 from issyl0/fix-brew-edit-with-graphical-editor

bin/brew: Fix `brew edit` behaviour when using a graphical editor

bin/brew

@@ -88,7 +88,7 @@ then
 
   FILTERED_ENV=()
   # Filter all but the specific variables.
-  for VAR in HOME SHELL PATH TERM TERMINFO COLUMNS LOGNAME USER CI SSH_AUTH_SOCK SUDO_ASKPASS \
+  for VAR in HOME SHELL PATH TERM TERMINFO COLUMNS DISPLAY LOGNAME USER CI SSH_AUTH_SOCK SUDO_ASKPASS \
              http_proxy https_proxy ftp_proxy no_proxy all_proxy HTTPS_PROXY FTP_PROXY ALL_PROXY \
              "${!HOMEBREW_@}" "${!TRAVIS_@}"
   do