[MFA-G]

Fixes sveltejs/language-tools#3151

Comments inside an opening tag were silently deleted in two cases:

<p /* a > b , c */ ></p>      <!-- before: <p></p> -->
<br /* a > b , c */ />        <!-- before: <br /> -->
<div /* comment */></div>     <!-- before: <div></div> -->
<div class="x" /* a > b */></div>  <!-- kept, but only by luck -->

Causes

1. No attributes: attachAttributeComments only looks at elements whose attributes array is non-empty, so a comment in <p /* c */> was never attached to anything and never printed.
2. > inside a comment: the end of the opening tag was found with original_text.indexOf('>', last_attr.end), which stops at the > inside the comment. A comment containing > after the last attribute fell outside that range and was dropped.

Fix

• findOpeningTagEnd scans for the closing > while skipping over the known comment ranges, so a > inside a comment is never taken as the end of the tag.
• For an element without attributes, the comments between the tag name (or the this={...} expression of <svelte:element>/<svelte:component>) and > are attached as dangling comments on the element. The element printer prints them where attributes would go (printDanglingTagComments). Line comments force the tag to break, and with bracketSameLine the > moves to its own line so it isn't commented out.

Tests

Added test/printer/samples/attribute-comment-without-attributes.html, which covers block and line comments, > inside comments, self-closing and void elements, components, <svelte:element this>, and comments after an attribute. It fails on master and passes with this change. I also checked the output by hand with --bracket-same-line and re-formatted it to make sure it's idempotent.

• pnpm test: 310 passed
• pnpm lint: passes
• pnpm check: shows the same two errors as on master (estree types, implicit any in print/index.ts). This PR adds no new ones.

Changeset included.