make alias test happy

completion/available/git.completion.bash

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 # Only operate on MacOS since there are no linux paths
-[ "$(uname -s)" == "Darwin" ] || return
+if [[ $(uname) == 'Darwin' ]] ; then
 
   # Make sure git is installed
   _command_exists git || return
@@ -24,5 +24,6 @@ for _comp_path in "${_git_bash_completion_paths[@]}" ; do
   done
 
   unset _git_bash_completion_paths
-
   _log_warning "no completion files found - please try enabling the 'system' completion instead."
+
+fi