Format multiline doc strings to match style of other help messages

cmd2/cmd2.py

@@ -34,6 +34,7 @@
 import inspect
 import os
 import pickle
+import pydoc
 import re
 import sys
 import threading
@@ -3155,17 +3156,21 @@ def do_help(self, args: argparse.Namespace) -> None:
                 # Set end to blank so the help output matches how it looks when "command -h" is used
                 self.poutput(completer.format_help(tokens), end='')
 
+            # If there is a help func delegate to do_help
+            elif help_func is not None:
+                super().do_help(args.command)
+
+            # If there's no help_func __doc__ then format and output it
+            elif func is not None and func.__doc__ is not None:
+                self.poutput(pydoc.getdoc(func))
+
             # If there is no help information then print an error
-            elif help_func is None and (func is None or not func.__doc__):
+            else:
                 err_msg = self.help_error.format(args.command)
 
                 # Set apply_style to False so help_error's style is not overridden
                 self.perror(err_msg, apply_style=False)
 
-            # Otherwise delegate to cmd base class do_help()
-            else:
-                super().do_help(args.command)
-
     def _help_menu(self, verbose: bool = False) -> None:
         """Show a list of commands which help can be displayed for"""
         cmds_cats, cmds_doc, cmds_undoc, help_topics = self._build_command_info()

tests/test_cmd2.py

@@ -981,6 +981,16 @@ def do_edit(self, arg):
     def do_undoc(self, arg):
         pass
 
+    def do_multiline_docstr(self, arg):
+        """
+        This documentation
+        is multiple lines
+        and there are no
+        tabs
+        """
+        pass
+
+
 @pytest.fixture
 def help_app():
     app = HelpApp()
@@ -1004,6 +1014,11 @@ def test_help_overridden_method(help_app):
     expected = normalize('This overrides the edit command and does nothing.')
     assert out == expected
 
+def test_help_multiline_docstring(help_app):
+    out, err = run_cmd(help_app, 'help multiline_docstr')
+    expected = normalize('This documentation\nis multiple lines\nand there are no\ntabs')
+    assert out == expected
+
 
 class HelpCategoriesApp(cmd2.Cmd):
     """Class for testing custom help_* methods which override docstring help."""