Remove random nbsp characters

I verified the above patch applies and removes the non-breaking spaces (UTF-8 character C2A0) that appear in the code. Patch also applies to D7 HEAD and should be committed there too.

I also searched all the rest of the Drupal source code and found no other unintentional uses of non-breaking spaces. (There are two other instances where non-breaking space characters were *intentionally* used, in includes/unicode.entities.inc and in modules/simpletest/tests/common.test - these instances should not be and are not affected by the patch.)

Above patch is in -p0 format. I will re-roll it if the testbot complains.

Reposting exact patch from the original issue to try to the the testbot to run.

Committed to 7.x and 8.x.

Deleting comment.