# ‘double backslash + newline’ collapses to ‘single backslash’ when I hit ‘edit’

When I try to edit Thorsten Donig's answer to 'large braces for specifying values of variables by condition', the following happens:

      0, & \text{if}\ a=1 \\
1, & \text{otherwise}


I get:

      0, & \text{if}\ a=1 \          1, & \text{otherwise}


Honestly, if it wasn't the part of the answer I was about to edit, I wouldn't have noticed. This is a serious problem since \\ is commonly found at the end of line in LaTeX.

I run FF35.0.1, no userscripts or stuff, on Fedora 20, MATE 1.8.1. Reported on more systems in more browsers, so it seems it's on the server side.

For anybody testing it: Please do not actually edit the answer! It seems to be a problem only for posts last modified in some given period of time, and you could spoil it! Thanks :-)

• I see the same in Chromium 40 on Kubuntu 14.04, for Leo Liu's answer as well. – Torbjørn T. Mar 11 '15 at 12:15
• I see the same problem with Google Chrome Version 39.0.2171.99 m, with and without my userscripts enabled, on Windows 7 Professional. – Paul Gessler Mar 11 '15 at 12:17
• I wonder if this is related at all to meta.tex.stackexchange.com/questions/5978/…? – Joseph Wright Mar 11 '15 at 12:35
• @JosephWright may well be, I thought about it as well, but didn't get myself to find the bug report actually. Thanks for doing that. – yo' Mar 11 '15 at 13:09
• i've been fighting with an (in-house) tool for preparing web material that invariably doubles backslashes on initial input. (that is, whatever i input and proofread and looks okay, when it gets to the web, every backslash is doubled. so i have to go back and re-edit to remove the bogus ones.) i don't know which is worse -- doubling or dividing by two. either way, it's an inexcusable corruption, mighty unhelpful to the person who's trying to get useful and correct information on a tex-related topic. – barbara beeton Mar 11 '15 at 13:35