Bat: Comments are incorrectly highlighted on a custom theme

[owd2]

What version of bat are you using?

bat 0.11.0

Describe the bug you encountered:

I followed the instructions from the readme and changed my theme to Cobalt2. Everything works great, except for the highlighting of comments - the comment text itself is highlighted correctly, but the character(s) which denote the start (or end) of a comment block are white. The issue is persistent among all file types which I've observed (such as C, Python, Common Lisp etc).

I didn't modify the cobalt2.tmTheme at all. Also, I uploaded it to http://tmtheme-editor.herokuapp.com/ to check, and it colors the comments correctly, which is why I assume this is not an issue related to the theme file itself.

Describe what you expected to happen?

I expected the color of the character(s) denoting comments to be the same color as the comment text itself.

How did you install bat?

GitHub release.

---

system
------

**$ uname -srm**
Linux 5.3.0-46-generic x86_64  

**$ lsb_release -a**
No LSB modules are available.  
Distributor ID: Ubuntu  
Description:    Ubuntu 18.04.4 LTS  
Release:    18.04  
Codename:   bionic  

bat
---

**$ bat --version**
bat 0.11.0  

**$ env**
PAGER=less  

**$ bat --list-languages**
Found custom syntax set.

**$ bat --list-themes**
Found custom theme set.

bat_config
----------

**$ cat /home/USERNAME/.config/bat/config**
\```
--theme="cobalt2"
\```

bat_wrapper
-----------

No wrapper script.

bat_wrapper_function
--------------------

No wrapper function for 'bat'.

No wrapper function for 'cat'.

tool
----

**$ less --version**
less 487 (GNU regular expressions)  

[keith-hall]

You're likely running into https://github.com/trishume/syntect/issues/36
Try changing
https://github.com/wesbos/cobalt2/blob/5b5d3d9abec6d1bef68d7051eaf1bb154e963e32/cobalt2.tmTheme#L51
to
<string>punctuation - punctuation.definition.string - punctuation.definition.comment</string>

[owd2]

Thank you, that fixed the issue.