Manparser: Also replace \(cq escapes in the non-Deroff manparser

I'm not entirely sure why we have multiple parsers here, but I'm
guessing there's a reason.

Fixes #7086.

share/tools/create_manpage_completions.py

@@ -260,6 +260,7 @@ def remove_groff_formatting(data):
     data = data.replace("\-", "-")
     data = data.replace(".I", "")
     data = data.replace("\f", "")
+    data = data.replace("\(cq", "'")
     return data