development mode upgrade

lib/self-upgrade.bash

@@ -20,12 +20,17 @@ function development_upgrade {
 
   cd "$MIAOU_BASH_DIR"/ || return 12 # should not happen
   [[ -n "$(git status --porcelain)" ]] &&
-    >&2 echo "ERROR: repository has uncommited changes" &&
+    >&2 echo 'ERROR: repository has uncommited changes!' &&
     builtin exit 12
 
-  git pull
+  local git_output
+  git_output=$(git pull 2>&1)
+  if echo "$git_output" | grep -q 'up to date'; then
+    : # does nothing
+  else
     sudo_root
     sudo miaou lib/initiate.bash
+  fi
 }
 
 function system_upgrade {