`-` character in a font family tokenized as `support.constant.mathematical-symbols.scss`

[alexr00]

Prerequisites

• Put an X between the brackets on this line if you have done all of the following:
  • Reproduced the problem in Safe Mode: https://flight-manual.atom.io/hacking-atom/sections/debugging/#using-safe-mode
  • Followed all applicable steps in the debugging guide: https://flight-manual.atom.io/hacking-atom/sections/debugging/
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Description

Part of syntax highlighting of meta.property-value mistaken as support.constant.mathematical-symbols

Steps to Reproduce

1. Create a file *.scss, (example: index.scss)
2. Add a style with the following code font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New', monospace;
3. Now you should see the minus symbol in source-code-pro aren't recognized as a meta.property-value as it does in a *.css file

Expected behavior:

When add the source-code-pro without quotation in .css, the editor recognizes the symbol as part of meta.property-value

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
    monospace;
}

CSS file showing meta property value being fully recognized:

Actual behavior:

The SCSS file showing meta property value was not fully recognized:

Reproduces how often:

100%

Versions

commit f52ab12

Originally from @edumqssan in microsoft/vscode#138536