... if literal strings are copied with formula expression tokens.

(cherry picked from commit dad412e0)

Conflicts:
	include/formula/token.hxx

Change-Id: I13526907bb6c2c605c6ed9584fa6e3f2b18623b8
Reviewed-on: https://gerrit.libreoffice.org/20731Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
(cherry picked from commit 58c8f4dc)