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- :e file
 - edit file
 - :e!
 - reedit, discarding changes
 - :r file
 - read from file; put after current line
 - :w
 - write back changes
 - :w file
 - write to file
 - :w! file
 - overwrite file
 - :!cmd
 - execute cmd in shell, then return to editor
 
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