A file of type "plain/text" (instead of text/plain)  was added to the repo recently, confusing svn into thinking it was binary.
A file of type "plain/text" (instead of text/plain) 
was added to the repo recently, confusing svn
into thinking it was binary.

Test for this by checking all the mime types (which we already had to do
anyway..) against an explicit list of those we allow... which is basically
all the sane types I found in the repo.

Remove the one remaining obviously wrong file type this exposed.



git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@27120 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot