Allow "staged" as result of parse_git_dirty().

If the corresponding parameter is not set "dirty" will be used as before.

lib/git.zsh

@@ -8,12 +8,13 @@ function git_prompt_info() {
 
 # Checks if working tree is dirty
 parse_git_dirty() {
-  local SUBMODULE_SYNTAX=''
-  if [[ $POST_1_7_2_GIT -gt 0 ]]; then
-        SUBMODULE_SYNTAX="--ignore-submodules=dirty"
-  fi
-  if [[ -n $(git status -s ${SUBMODULE_SYNTAX}  2> /dev/null) ]]; then
+  gitstatus=$(git status --porcelain ${SUBMODULE_SYNTAX} 2> /dev/null)
+  if [[ -n "$gitstatus" ]]; then
+    if [[ "$gitstatus" =~ '^[MADRCU].*$' ]] && (($+ZSH_THEME_GIT_PROMPT_STAGED)); then
+      echo "$ZSH_THEME_GIT_PROMPT_STAGED"
+    else
       echo "$ZSH_THEME_GIT_PROMPT_DIRTY"
+    fi
   else
     echo "$ZSH_THEME_GIT_PROMPT_CLEAN"
   fi