asciidoc2html: Check files recursively with --all.

scripts/asciidoc2html.py

@@ -77,7 +77,11 @@ def main(colors=False):
     except FileExistsError:
         pass
     if args.all:
-        for src in glob.glob('**/*.asciidoc') + glob.glob('*.asciidoc'):
+        for root, _dirs, files in os.walk(os.getcwd()):
+            for filename in files:
+                if os.path.splitext(filename)[1] != '.asciidoc':
+                    continue
+                src = os.path.join(root, filename)
                 parts = [args.all[0]]
                 dirname = os.path.dirname(src)
                 if dirname: