Syntax highlighting issues

[heyzec]

• Function definitions with >1 parameters
  

• Nested function calls, especially those with newline, breaks subsequent highlighting
  

• Multiple divisions or multiline comments can be interpreted as (illegal) regex
  

• Multiline comment syntax within expressions not highlighted correctly
  

[mug1wara26]

• Arrow should be highlighted together

• In javascript (and source), you can escape newlines using backslash for multiline strings

[mug1wara26]

Im not sure what is causing the arrow to not be matched properly, using vscodes Inspect Editor Tokens and Scopes feature, we can see that the ">" in the "=>" is being matched first, even though arrow-function has higher priority

removing the operator rule, the arrow doesnt even get matched at all