Documentation fixes (#1507)

* fixed documentation displaying 2 section titles when rendered.

* fixed readme exmple indentation of function to make it a member of the FirstApp so when copied will work as intended.

---------

Co-authored-by: Todd Leonhardt <[email protected]>

Author: theagilehacker

README.md

@@ -127,9 +127,8 @@ import cmd2
 class FirstApp(cmd2.Cmd):
     """A simple cmd2 application."""
 
-
-def do_hello_world(self, _: cmd2.Statement):
-    self.poutput('Hello World')
+    def do_hello_world(self, _: cmd2.Statement):
+        self.poutput('Hello World')
 
 
 if __name__ == '__main__':

docs/index.md

@@ -25,13 +25,13 @@ app = App()
 app.cmdloop()
 ```
 
-## Getting Started
+<!-- Getting Started -->
 
 {%
    include-markdown "./overview/index.md"
 %}
 
-## Migrating from cmd
+<!-- Migrating from cmd -->
 
 {%
    include-markdown "./migrating/index.md"