feat: trim whitespace from concise mode fences

[LuLaValva]

In previous versions of this parser, concise mode code fences preserved their leading and trailing whitespace

--
Hello World
--
// `\nHello World\n`

These changes trim that whitespace, and also whitespace from leading tabs

[changeset-bot]

🦋 Changeset detected

Latest commit: 58bf756

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
htmljs-parser	Minor

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.96%. Comparing base (da2e80d) to head (58bf756).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #199      +/-   ##
==========================================
+ Coverage   91.87%   91.96%   +0.09%     
==========================================
  Files          28       28              
  Lines        1427     1443      +16     
  Branches      323      327       +4     
==========================================
+ Hits         1311     1327      +16     
  Misses         54       54              
  Partials       62       62              

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[coderabbitai]

Walkthrough

Adds a changeset for htmljs-parser documenting concise-mode trimming of boundary newlines and leading indentation. Parser.ts now avoids emitting empty text events at EndText. BEGIN_DELIMITED_HTML_BLOCK refactors delimited HTML block end-of-line and indentation handling, adjusts cursor advancement, whitespace trimming, and text-boundary start/end logic via a new first parameter. util.htmlEOF conditionally trims trailing whitespace before ending text when there is no active tag or the active tag is concise. A test fixture file was expanded with additional blocks and a trailing newline.

🚥 Pre-merge checks | ✅ 3 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 25.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'feat: trim whitespace from concise mode fences' clearly and accurately describes the main objective of the pull request.
Description check	✅ Passed	The description explains the previous behavior and the new behavior, providing a concrete example of what changed regarding whitespace handling in concise mode fences.
Merge Conflict Detection	✅ Passed	✅ No merge conflicts detected when merging into main

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch trim-fence-whitespace

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@src/states/BEGIN_DELIMITED_HTML_BLOCK.ts`:
- Around line 98-102: The close-delimiter branch currently calls
parser.endText() while leaving any trailing spaces before the newline untouched;
update the delimiter-close path (the block that checks
parser.lookAheadFor(endHtmlBlockLookahead, parser.pos + newLineLength)) to trim
trailing whitespace before ending the text, mirroring the dedent path behavior:
scan backwards from parser.pos to remove spaces/tabs (or adjust parser.pos) so
trailing boundary whitespace is excluded, then call parser.endText(), update
parser.pos by newLineLength + endHtmlBlockLookahead.length, and set
parser.forward = 0; ensure you use the same trimming logic used by the dedent
path to keep behavior consistent.