Fix a small issue in the example commands in ‘GitHub Pull Requests’

The large example of shell commands places the comments directly above
the commands.  However, the first set of comments and commands has a
blank line between them.  I remove this line for consistency with the
rest of the examples.
Add article ‘PHP Optional Parameters Out of Order’
Add titles to all pages and articles as HTML comments

This is useful to me so I remember what title to give the content when
actually posting it via WordPress.
Add page ‘Blogs’
Add article ‘LÖVE File-System Introduction’