allow fixing in pre-commit script

will only change things in non-staging files. So at least if everything was added beforehand, changes of script can be reversed

but the script seems quite reliable now

scripts/pre-commit

@@ -16,13 +16,13 @@ ask() {
     while true; do
 
         if [ "${2:-}" = "Y" ]; then
-            prompt="Y/n"
+            prompt="Y/n/c(hange)"
             default=Y
         elif [ "${2:-}" = "N" ]; then
-            prompt="y/N"
+            prompt="y/N/c(hange)"
             default=N
         else
-            prompt="y/n"
+            prompt="y/n/c(hange)"
             default=
         fi
 
@@ -39,6 +39,7 @@ ask() {
 
         # Check if the reply is valid
         case "$REPLY" in
+            c*|C*) ./.maindir/scripts/repairgitlabmathmd.sh ; return 1 ;;
             Y*|y*) return 0 ;;
             N*|n*) return 1 ;;
         esac