Change end-of-map test to allow arbitrary keys.

Well, the only key that was forbidden was \q_recursion_tail
or anything with the same string representation.  Now even
that key does not stop the mapping prematurely.


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4409 de43f980-851b-0410-b2f7-c40aca1f87e0
Use fp_if_exist, not cs_if_exist, in a test file


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4410 de43f980-851b-0410-b2f7-c40aca1f87e0