[Vimcdoc-translate] for help

[chimin y. <ych...@ya...>]

Hi, All:

I cannot guess what this means by the author:

   [usr_24.txt] These special keys are most useful 
    when writing a mapping that doesn't leave Insert
    mode.  The extra typing doesn't matter then.

(1) "writing" - defining or typing/editing/using?

(2) "doesn't leave Insert mode" - associated with 
 "writing" or "mapping"?

Defining a mapping is always done under Normal mode 
via ":map" or ":imap" command. If it's latter, then,
according to usr_40, append "a" makes a mapping to
remain in Insert mode. No much of usefulness that I
see for these special keys.
 
I need someone to contribute a practical example that
demonstrates "these special keys are most useful" in 
a situation as described here by the author

CY.   

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