File inconsistence on "push"

[undermink]

Hitting the "push" button gave me a permanent "File inconsistent with pad content"-Error.
Changing:
if (adat !== text.slice(0, -1)) {
to
if (adat !== text) {
in handleButtonMessage.js seems to fix it for me.

https://github.com/LaKing/ep_codepad/blob/master/handleButtonMessage.js#L108

[LaKing]

Etherpad sometimes adds a newline character sometimes. Indeed we can make that conditions more tolerant.