'undef' is not treated as a special value

[thule0]

What Versions are you running?

OS Version: Catalina
VSCode Version: 1.46.1
Puppet Extension Version: 0.27.3
PDK Version: puppet agent

What You Are Seeing?

Parsing of comments breaks in certain blocks.
The whole block turns bold (I do not know what this means), and if there's a quote in a comment, it is parsed as an opening quote for a string, which breaks the rest of the file.

I have been able to reproduce it in a block where a comparison with undef happens (other values do not produce this behavior):

# This comment is fine
if $var != undef {
    # This comment doesn't  parse properly
    file { 'thing': } 
}

What is Expected?

Pretty obvious

How Did You Get This To Happen? (Steps to Reproduce)

Open new or existing .pp file.
Type example code from above.

Output Log

[glennsarti]

Moved to editor syntax.

Pretty obvious

Ha, yeah it is

[llowder]

In an epp file, specifically in a templated shell script, comment highlighting breaks inside function blocks.
screen shot

[glennsarti]

Directly attaching the image

[glennsarti]

@llowder I've moved your issue to #68 as it is not the same as this issue.