doc: Handle exception in parsing parameter description (#60933)

Fixes: #60587

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

changelogs/fragments/60587-doc_parsing.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - Handle exception encountered while parsing the argument description in module when invoked via ansible-doc command (https://github.com/ansible/ansible/issues/60587).

lib/ansible/cli/doc.py

@@ -507,9 +507,13 @@ class DocCLI(CLI):
             text.append("%s %s" % (opt_leadin, o))
 
             if isinstance(opt['description'], list):
-                for entry in opt['description']:
+                for entry_idx, entry in enumerate(opt['description'], 1):
+                    if not isinstance(entry, string_types):
+                        raise AnsibleError("Expected string in description of %s at index %s, got %s" % (o, entry_idx, type(entry)))
                     text.append(textwrap.fill(DocCLI.tty_ify(entry), limit, initial_indent=opt_indent, subsequent_indent=opt_indent))
             else:
+                if not isinstance(opt['description'], string_types):
+                    raise AnsibleError("Expected string in description of %s, got %s" % (o, type(opt['description'])))
                 text.append(textwrap.fill(DocCLI.tty_ify(opt['description']), limit, initial_indent=opt_indent, subsequent_indent=opt_indent))
             del opt['description']