Address the issue where 'posts' was treated as a mutable object
in 'flaskr/blog.py'. The 'posts' variable is an immutable cursor,
which led to errors when attempting to modify it directly.
The solution involved creating a new list from the cursor to allow
modifications without affecting the original cursor. This change
ensures that the application logic remains intact while preventing
any runtime errors related to immutability.
Implemented markdown support in the post body to enhance
text formatting capabilities. This change allows users to
enter markdown in the create/update interface and have it
rendered as HTML in the main blog interface. The markdown
library was imported and utilized to convert markdown text
to HTML in the blog index view. Additionally, updated the
form labels to indicate markdown support and ensured safe
rendering of HTML content in the blog index template.
Issue ID: FLAS-67
