Fork _list_functions_in for narrow listing

ffoo.sh.in

             local mod=$(ffoo _parse_fspec_to_mod "$2")
             echo "${2##$mod.}"
             ;;
-        _parse_path_to_fnlist)
+        _parse_path_to_fspeclist)
             grep -HE '^[[:alnum:]_]+\(\) \{' "$2" \
               | sed -e 's/^.*\///; s/\.sh:/./; s/(.*//'
             ;;
+        _parse_path_to_fnlist)
+            grep -E '^[[:alnum:]_]+\(\) \{' "$2" \
+              | sed -e 's/^.*\///; s/(.*//'
+            ;;
 
         _cat_function)
             local mod=$(ffoo _parse_fspec_to_mod "$2")
             ffoo _list_mfiles $2 | head -1
             ;;
         _list_functions)
+            ffoo _list_mfiles "$2" | ffoo _parse path fspeclist
+            ;;
+        _list_functions_in)
             ffoo _list_mfiles "$2" | ffoo _parse path fnlist
             ;;