bug#21746: 24.5; purpose of dired-keep-marker-copy?

[Eli Zaretskii]

> Date: Fri, 23 Oct 2015 13:30:29 -0700 (PDT)
> From: Drew Adams <drew.adams@oracle.com>
> 
> > I have never figured out a
> > reason why copying a file in dired gives the copied file a marker
> > `C'.
> 
> The reason (IMO) is that the marker indicates what the
> operation was, so you can easily identify - *and then
> operate on* the files that were copied (or whatever
> the operation was).
> 
> What might be missing for you is this bit of info:
> `* c' lets you change the char that is used for a given
> mark.  So you can, for example, change all `C' marks at
> a given moment to, say, `*' marks, and then use any
> action on the marked files (which acts on `*'-marked
> files).  Or change it to `D' and then delete the flagged
> files.
> 
> Because mark `C' is used, there is no confusion with
> files that might be marked with `*' or any other mark.
> 
> You can have any number of different marks at any time,
> giving them any conceptual meaning you like.  Change
> any of them to `*' to convert their files and dirs to
> a set that you then act on in some way.
> 
> Dunno how much of this is documented in the manual,
> but once you look at `C-h m' and then its mention
> of `* c', you can pretty much imagine how it can be
> put to good use.

Patches to document this are welcome.