NameetP/pdfmux

Regression-guard release

No behavior changes. Adds 11 behavioral-contract tests for the real-world failure modes that prompted the 1.6.1 work — pinning correct behavior so it can't silently regress.

Test categories

• Truncated PDF streams — the four pypdf: Stream has ended unexpectedly cases from the original batch run. pdfmux must either recover (PyMuPDF's xref repair) or raise — never silently return empty.
• Non-ASCII filenames — CJK + full-width punctuation (Coolsoft test reports（原版）.pdf). Both extract_text and batch_extract must accept these without shell-quoting issues.
• Arabic-only PDFs — the BiDi post-processor must not crash on RTL text.
• 0-byte files — must raise a named PdfmuxError, never silently return empty.
• HTML files renamed to .pdf — common when 'view as PDF' saves the page source. Must error cleanly OR return text without HTML markup.
• Missing files — must raise FileError, not a bare FileNotFoundError.
• Batch isolation — a bad file in batch_extract must yield an exception for that file without poisoning the rest of the batch.

Numbers

• 670 passing (was 659 in 1.6.1)
• 0 behavior changes
• 0 source code changes — tests-only release

Install: pip install -U pdfmux