These two files:
have DOS newline characters at the end of each line.
emacs shows these characters in the former file, but not in the latter for some reason (possibly because the former file has a mix of newline characters whereas the latter is entirely-DOS)
Per https://developer.mozilla.org/En/Mozilla_Coding_Style_Guide , the Mozilla codebase is standardized on Unix newline characters.
Patch coming up that converts the files, using the "fromdos" command-line utility (same as "dos2unix") on Ubuntu.
Created attachment 576329 [details] [diff] [review]
Landed (as DONTBUILD):