Update the Reference Manual

[Benbinbin]

I found the example about the method styleTags in Reference Manual is outdated

the example still use the parser.withProps method which has removed

[marijn]

Thank you for spotting that. This patch updates the example.

Fix outdated example in doc comment

[Benbinbin]

Great!

and find another improvement for System Guide document

missing two command-line options supported by lezer-generator :

• the --typescript option

• the --help option

[marijn]

I’ve added an item for --typeScript. --help doesn’t seem that useful to someone who’s already looking at documentation.