docs(pdf): handle multiline internal links

Refs #656

scripts/mkdocs2pdf.py

@@ -222,7 +222,7 @@ def buildDocForLang(lang):
     mergedDocFilename = mergedDocFilenamePrefix + lang
     mergedDocOutputPath = os.path.join(pdfBuildDir, mergedDocFilename)
     # remove internal links @TODO convert them to hyperref ?
-    s = re.sub(r'\[([^/\^]+?)\]\([^ ]+?\.md\)', r'\1', s)
+    s = re.sub(r'\[([^/\^]+?)\]\([^ ]+?\.md\)', r'\1', s, flags=re.MULTILINE)
     with open('{}.md'.format(mergedDocOutputPath), 'w') as f:
         f.writelines(s)