Initial import from garrytan/gstack@026751e (main snapshot via local relay)

Source: https://github.com/garrytan/gstack/commit/026751e

make-pdf/test/fixtures/combined-gate.md

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+# The Horizon
+
+This is the combined-features fixture. Every feature turned on simultaneously.
+The gate asserts that all of these paragraphs extract cleanly from the PDF
+with pdftotext.
+
+A paragraph with **bold**, *italic*, and `inline code` tokens — each of which
+gets a different HTML treatment. None should fragment text on copy-paste.
+
+A paragraph with "curly quotes", 'single quotes', an em dash -- like this,
+and an ellipsis... All three get smartypants transforms.
+
+## A subsection heading
+
+Lists must not break mid-item:
+
+- First list item with some words that keep it on one line.
+- Second list item with more words.
+- Third list item.
+
+> A blockquote from Van Dyke. Her diminished size is in me, not in her.
+
+# A second chapter
+
+This content begins on a fresh page because the default chapter-breaks rule
+fires. Extract must still find these paragraphs.
+
+A final paragraph with enough words to trigger hyphenation across the line
+wrap boundary. Extraordinary words sometimes hyphenate. Interdisciplinary
+ones certainly do.