Improper handling of uploaded patch files with lines that have leading dashes

Crucible improperly processes patch files for diffs on files with leading dashes in their lines. This is really easy to reproduce with Lua files.

I attached a rev-1 and rev-2 version of a demo Lua file. I also made a diff using "diff -Nar --unified=100 file-rev1.lua file-rev2.lua >lua-patch.txt" and attached that file as well.

If you create a review in Crucible and upload lua-patch.txt you'll get a diff that stops at line 57 of the patch file. After that line of ------'s the remainder of the file that was added in rev 2 is invisible to Crucible.

My guess is that it's a bug in processing of the — leader to separate files in patches. If I prefix all the comments in the file with a space before the – then Crucible processes the patch properly. I'm uploading lua-patch2.txt which shows this to be the case.