D25034.1732776103.diff
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D25034.1732776103.diff
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	diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupCodeBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupCodeBlockRule.php
	--- a/src/infrastructure/markup/blockrule/PhutilRemarkupCodeBlockRule.php
	+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupCodeBlockRule.php
	@@ -44,7 +44,14 @@
	}

	public function markupText($text, $children) {
	+ $default_lang = null;
	+
	if (preg_match('/^\s*```/', $text)) {
	+ // Look for GFM-style ```langname blocks and handle them
	+ if (preg_match('/^\s``` ([a-z]+)\n/', $text, $matches)) {
	+ $default_lang = $matches[1];
	+ $text = preg_replace('/^\s``` ([a-z]+)\n/', '', $text);
	+ }
	// If this is a ```-style block, trim off the backticks and any leading
	// blank line.
	$text = preg_replace('/^\s```(\s\n)?/', '', $text);
	@@ -58,7 +65,7 @@

	$options = array(
	'counterexample' => false,
	- 'lang' => null,
	+ 'lang' => $default_lang,
	'name' => null,
	'lines' => null,
	);