debug: worddesc show more information

This seems appropriate since worddescs are getting more and more complex:
markers, flags, tokentypes, ...

test.sh

@@ -579,8 +579,32 @@ hello hi
 EOF
 
 when_run <<EOF "quoted parentheses are not operators"
+.debug
+.exec
 echo unclosed '('
 EOF
-todo
+expecting <<EOF
+[dbg: 1]
+[exec: 0]
+ ╰─ t_simple_cmd
+     ├─ line = 0
+     ├─ t_wordlist
+     │   ├─ t_worddesc
+     │   │   ├─ word   = [echo]
+     │   │   ├─ marker = [    ]
+     │   │   ├─ flags = 0
+     │   │   ╰─ t_token_type = WORD_TOKEN
+     │   ├─ t_worddesc
+     │   │   ├─ word   = [unclosed]
+     │   │   ├─ marker = [        ]
+     │   │   ├─ flags = 0
+     │   │   ╰─ t_token_type = WORD_TOKEN
+     │   ╰─ t_worddesc
+     │       ├─ word   = ['(']
+     │       ├─ marker = [ ' ]
+     │       ├─ flags = 2
+     │       ╰─ t_token_type = WORD_TOKEN
+     ╰─ redirections = (empty redir list)
+EOF
 
 finalize