(GitHub Collapse Markdown) fix for no longer working in Greasemonkey

[darkred]

The following is a Firefox/Greasemonkey-only issue:
in Chrome 53/Tampermonkey 4.1.10 the issue doesn't occur.

Using GCM v1.1.3 with GM 3.9 in FF 49 (win 10 x64).

The script was no longer collapsing Markdown in any GitHub page.
To make sure I tried in a fresh FF profile with only GM installed and the script
and opened as a reference https://github.com/sinatra/sinatra
(i.e. is the page that you used in the screen capture) :
no content was collapsed.

I was getting

missing = in const declaration                 GitHub_Collapse_Markdown.user.js:233:13

in Browser Console.

So, changing lines 233 and 240
from
for (const el of els) {
to
for (let el of els) {
fixes the issue.

[Mottie]

Hi @darkred!

Thanks for letting me know! I'll have it fixed in a minute!

Also, in case you didn't know, I'll be going out of town for the next month starting tomorrow. So if you don't get a response from me, you'll know why.

[darkred]

You're welcome.
And thanks for letting me know, I really appreciate it.