:so[urce] {file} Read Ex commands from {file}. These are commands that
start with a ":".
Triggers the |SourcePre| autocommand.
:so[urce]! {file} Read Vim commands from {file}. These are commands
that are executed from Normal mode, like you type
them.
When used after |:global|, |:argdo|, |:windo|,
|:bufdo|, in a loop or when another command follows
the display won't be updated while executing the
commands.
{not in Vi}