custom syntax in sublime 3

Currently working for a company that is using their own programming language. It comes close to python (thus I'm using this syntax), yet the only differences are e.g.:

line comments being "initialized" by '..' (two dots)

Yet replacing python's syntax-file in the comments section from '#' to '..' makes it comment out pretty much everything.

I'm thinking there's some option further down the syntax-file colliding with this change.

(line 404)

comments: 
- match: '#'
  scope: punctuation.definition.comment.python
  push:
    - meta_scope: comment.line.number-sign.python
    - match: \n
      pop: true

Solution

Try this:

- match: '\.\.'

In regular expressions, . matches any character, so '..' would match any two characters. With a a backslash, you escape it, making it match a literal period character only.