See the complaint on #4039. This doesn't fix that particular
issue (it's somewhat unrelated), but does solve around
a file parsing problem reported by @void-in
'hex-all' encoding was previously ignoring slashes.
This pull adds 'hex-noslashes' mode which carries forward the previous functionality, and replaces all existing references to 'hex-all' with 'hex-noslashes' It then adds a replacement 'hex-all' mode, which really encodes *ALL* characters.
wchen-r7