Silence include links output in POSIX shell

check_links_include.py

@@ -20,7 +20,7 @@ for filename in iglob('*/*/*.md'):
 
 no_tag = []
 for filename in section_markdown_files:
-    cmd = r"tail -5 " + filename + r" | egrep '{% include links.md %}' &> /dev/null"
+    cmd = r"tail -5 " + filename + r" | egrep '{% include links.md %}' > /dev/null"
     try:
         exit_code = subprocess.check_call(cmd, shell=True)
     except subprocess.CalledProcessError: