Fixed spelling in docstring

Author: kmvanbrunt

examples/read_input.py

@@ -86,7 +86,7 @@ def do_custom_choices_provider(self, _) -> None:
 
     @cmd2.with_category(EXAMPLE_COMMANDS)
     def do_custom_completer(self, _) -> None:
-        """all read_input to use custom history and completer function"""
+        """Call read_input to use custom history and completer function"""
         self.poutput("Tab completing paths and using custom history")
         try:
             input_str = self.read_input(