refactor(parser/lexer): shorten code

[overlookmotel]

Pure refactor. Shorten code by using Option::get_or_insert_with.

[overlookmotel]

• refactor(parser/lexer): shorten code #10999 👈 (View in Graphite)
• main

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[overlookmotel]

Small and uncontroversial change, so merging without review.

[overlookmotel]

Merge activity

• May 13, 7:03 AM EDT: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• May 13, 7:10 AM EDT: overlookmotel added this pull request to the Graphite merge queue.
• May 13, 7:17 AM EDT: Merged by the Graphite merge queue.

[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #10999 will not alter performance

_{Comparing 05-13-refactor_parser_lexer_shorten_code (c993edd) with main (13dbcc6)}

Summary

✅ 33 untouched benchmarks
🆕 3 new benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
🆕	linter[RadixUIAdoptionSection.jsx]	N/A	2.8 ms	N/A
🆕	linter[cal.com.tsx]	N/A	1.2 s	N/A
🆕	linter[checker.ts]	N/A	3.1 s	N/A