[RP] [PATCH] fix bug in command history

[Bernhard R. Link]

Attached patch fixes a problem in command history:
In order to store the shell command history in the general ratpoison
history and to avoid forcing the user to remember which prompt some
program was started, the ratpoison history stores shell command lines
also in the general command history prefixed with the command in
question (e.g. exec).

The code in question has the problem that it always adds this when
a shell command is executed and not only when the shell command to
be executed was just entered. Thus an exec from some keybinding also
adds those into the history.

Attached patch should fix this.

0001-only-add-command-to-general-history-if-it-was-entere.patch
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