Confusion about vim folding - how to disable?

Question

1. When I open the file it looks like this: or even this

Answer 1

Just adding one more to make it complete to the point of discussion.

To enable code folding:

:set foldenable or in short, :set fen

To disable code folding:

:set nofoldenable or in short, :set nofen

Once you enable codefolding, you will have all the commands like zf,zo etc at your wish according to the setting of :set fdm=xxxx where typical values are expr,syntax,manual etc.