[MERGE] Replace mail-mode call with compose-mail from GNU Emacs.

[Xavier Maillard]

   tripled-quote strings work, even though e.g. Emacs syntax highlighting
   will typically be confused by strings like

     """This looks like a string "but this does not"."""

My GNU Emacs just does the right thing here with this string.
What do you mean by "confused" ?

	Xavier
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