pythongh-102541: Fix Helper.help when output is non default

Author: Eclips4

Lib/pydoc.py

@@ -1790,7 +1790,10 @@ def doc(thing, title='Python Library Documentation: %s', forceload=0,
                 raise
             print(exc)
     else:
-        output.write(render_doc(thing, title, forceload, plaintext))
+        try:
+            output.write(render_doc(thing, title, forceload, plaintext))
+        except ImportError as exc:
+            output.write(str(exc))
 
 def writedoc(thing, forceload=0):
     """Write HTML documentation to a file in the current directory."""