Merge branch 'jg/prompt-localize-temporary'

"git-prompt" (in contrib/) used a variable from the global scope,
possibly contaminating end-user's namespace.

* jg/prompt-localize-temporary:
  git-prompt.sh: make $f local to __git_eread()

contrib/completion/git-prompt.sh

@@ -270,7 +270,7 @@ __git_ps1_colorize_gitstring ()
 
 __git_eread ()
 {
-	f="$1"
+	local f="$1"
 	shift
 	test -r "$f" && read "$@" <"$f"
 }