Tip 38: Manage Hidden Files

Command	Effect
`:w[rite]`	Write the contents of the buffer to disk
`:e[dit]!`	Read the file from disk back into the buffer (that is, revert changes)
`:qa[ll]!`	Close all windows, discarding changers without warning
`:wa[ll]`	Write all modified buffers to disk

Enable the 'hidden' Setting Before Running `:argdo` or `:bufdo`

If we enable the 'hidden' setting, then we can use the :next/:bnext/:cnext commands without a trailing bang.
After running :argdo {cmd},
- check buffers one by one: :first, :wn, etc.
- save all buffers: :argdo write or :wall

# If you open the file in vim,
# then you can \"ayy@a the next line to execute the vim command: 
:h 'hidden'