[mnkj0021]

Fixes #94

Summary

• treat a bare {# opener at end-of-file as an empty comment, matching Jinja2
• keep malformed unterminated comments with content (for example {# followed by a space) as errors
• explicitly advance to EOF so the old unclosed-comment loop cannot return
• add regression coverage for a bare EOF comment and text immediately before it

Compatibility detail

Jinja2's behavior is narrower than accepting every unterminated comment: a bare {# at EOF renders as an empty comment, while {# followed by content still raises Missing end of comment tag. This change preserves that distinction.

Validation

• focused SyntaxTest.SimpleCases passed against Minja when the change was prepared
• the same focused test passed with USE_JINJA2=1 against Jinja2 3.1.6
• git diff --check passes on the current branch
• branch is current with upstream main (0 commits behind)
• Google CLA and the change-detection check pass

The main CI and security-scan workflows are currently action_required and need a Google maintainer to approve the fork workflow run.