👌 IMPROVE: Allow newline in <? ... ?> in an inline context

Same same fix as in commonmark/commonmark.js#196
Implements: markdown-it/markdown-it@8ad16ac

Author: chrisjsewell

markdown_it/common/html_re.py

@@ -17,7 +17,7 @@
 
 close_tag = "<\\/[A-Za-z][A-Za-z0-9\\-]*\\s*>"
 comment = "<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->"
-processing = "<[?].*?[?]>"
+processing = "<[?][\\s\\S]*?[?]>"
 declaration = "<![A-Z]+\\s+[^>]*>"
 cdata = "<!\\[CDATA\\[[\\s\\S]*?\\]\\]>"
 

tests/test_port/fixtures/commonmark_extras.md

@@ -255,6 +255,15 @@ List item terminating quote should not be paragraph continuation
 </ol>
 .
 
+Allow EOL in processing instructions, commonmark/commonmark.js#196.
+.
+a <?
+?>
+.
+<p>a <?
+?></p>
+.
+
 Allow meta tag in an inline context, commonmark/commonmark-spec#527.
 .
 City: