feat: allow empty lines in snapshot

[George-Ogden]

Description

This PR allows empty lines in the snapshot file to be treated that way, without affecting other snapshot semantics.

Related Issues

• closes .ambr snapshot files have meaningful trailing whitespace #619, which asks for this feature

Checklist

• This PR has sufficient documentation.
• This PR has sufficient test coverage.
• This PR title satisfies semantic convention.

Additional Comments

No additional comments.

[noahnu]

Syrupy amber snapshots are an exact representation of the data being snapshotted. We can't ignore trailing newlines, see the comments I left in the linked issue.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@           Coverage Diff           @@
##             main    #1042   +/-   ##
=======================================
  Coverage   97.29%   97.30%           
=======================================
  Files          21       21           
  Lines        1666     1669    +3     
=======================================
+ Hits         1621     1624    +3     
  Misses         45       45           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.