Please update CodeMirror Addon

[tranzitwww]

Description

Trying to do a CRTL+A and CRTL+C for a code larger than 1055 characters may results in having a clipboard with just one character "-" (minus).
It always fill the clipboard with "-" when trying to copy a larger text code, and this is frustrating :)

I've opened this bug to another project and they had updated the codemirror add-on and now is working.
greasemonkey/greasemonkey#2894
openstyles/stylus#225

Steps to Reproduce

Go to https://beautifier.io/
Select Beautify CSS
Put the content form http://danielmontague.com/css/main.min.css
Click Beautify Code
Copy the Beautified code (CRTL+A and CRTL+C)
Paste somewhere
The result will be "-". Just one character was getting into the clipboard during copy process

Environment

OS:
Win7 64Bit
Firefox 68.0.1

[bitwiseman]

Updated and improved to work with CSS and html highlighting.