GFM underscore parsing is broken

[javoire]

To recap on_our_use_case

becomes

And it shouldn't, according to https://help.github.com/articles/github-flavored-markdown#multiple-underscores-in-words. The result should be the same as the input:

To recap on_our_use_case

Cheers,
JD

[javoire]

Also, this

becomes

Should be:

variable_with_underscores = 1

Fix hack (one back slash):

[javoire]

lastly:

becomes:

Fix hack (two backslashes):

[http://example.com/link\\_with\\_underscore](http://example.com/link_with_underscore)

cheers!

[javoire]

the behaviour is not consistent though. In some of our markdown files (with more code blocks and heavier markup) this behaviour is shown, and in others (usually lighter markup) it works as expected. I'll update here when I know more

[javoire]

Allright, I've finally narrowed a reproducable setup.
So this:

Lorem_ipsum dolor sit amet, __consectetur adipisicing__ elit. Voluptatem a __ea voluptas nihil__ error modi.
Lorem_ipsum dolor sit amet, **consectetur adipisicing** elit. Voluptatem a **ea voluptas nihil** error modi.

Should result in this:
Lorem_ipsum dolor sit amet, consectetur adipisicing elit. Voluptatem a ea voluptas nihil error modi.
Lorem_ipsum dolor sit amet, consectetur adipisicing elit. Voluptatem a ea voluptas nihil error modi.
(e.g. identical, docs)

But instead it results in this:

Reproduce steps

1. input.md:

Lorem_ipsum dolor sit amet, __consectetur adipisicing__ elit. Voluptatem a __ea voluptas nihil__ error modi.
Lorem_ipsum dolor sit amet, **consectetur adipisicing** elit. Voluptatem a **ea voluptas nihil** error modi.

2. run marked:

marked -i input.md -o output.html

3. output.html

<p>Lorem<em>ipsum dolor sit amet, <strong>consectetur adipisicing</strong> elit. Voluptatem a <em>_ea voluptas nihil</em></em> error modi.</p>
<p>Lorem_ipsum dolor sit amet, <strong>consectetur adipisicing</strong> elit. Voluptatem a <strong>ea voluptas nihil</strong> error modi.</p>

Cheers

[javoire]

This one also produces wrong output:
in

Lorem_ipsum_dolor sit_amet, consectetur adipisicing elit. _[laborum rerum](laborum rerum)_

out

<p>Lorem<em>ipsum_dolor sit_amet, consectetur adipisicing elit. </em><a href="laborum rerum">laborum rerum</a>_</p>

[notatestuser]

I have one too:

while this is correct

$ marked
{{some_test_thing}}
<p>{{some_test_thing}}</p>

this is not

$ marked
{{some_test_thing}} _another_ thing
<p>{{some<em>test_thing}} _another</em> thing</p>

[Feder1co5oave]

Can't reproduce this at 33b444c

edit: I can reproduce this though.

bin/marked 
Lorem_ipsum_dolor sit_amet, consectetur adipisicing elit. _[laborum rerum](laborum rerum)_
<p>Lorem_ipsum_dolor sit<em>amet, consectetur adipisicing elit. </em><a href="laborum rerum">laborum rerum</a>_</p>

[joshbruce]

Closing as I believe this will be fixed via spec-compliance. See #1106 and #1216