New to Nearley grammar, not sure what is going wrong here. Here is my grammar to get whatever is placed inside an opening and closing parenthesis.

@builtin "whitespace.ne"

with_in_brackets ->
    "(" _ args _ ")" {% d => ({
      type: 'inside_brackets',
      argumentstring: d[2]
    })%}
    
args -> .:* {% d => d[0].join("") %}

• Test Input - (hello, " ", world)
• Expected Result - {type: "inside_brackets", argumentstring: "hello, " ", world"}
• Actual Result - {type: "inside_brackets", argumentstring: "hello, " ", world"}

Notice - the actual result is compacting 4 whitespaces to 1 whitespace. Not sure why this is happening.

Any thoughts? FYI - I am using Nearley Playground to test my grammer on Safari v15 browser.