Added a warnings filter for some versions of 'coverage' under Py3.

 - Legacy-Id: 17680

Author: levkowetz

ietf/settings.py

@@ -31,8 +31,10 @@
 warnings.filterwarnings("ignore", message="'U' mode is deprecated", module="xml2rfc")
 warnings.filterwarnings("ignore", message="'U' mode is deprecated", module="site")
 warnings.filterwarnings("ignore", message="Flags not at the start of the expression", module="genshi")
+warnings.filterwarnings("ignore", message="Flags not at the start of the expression", module="coverage")
 warnings.filterwarnings("ignore", message="encodestring\(\) is a deprecated alias since 3.1, use encodebytes\(\)")
 
+
 try:
     import syslog
     syslog.openlog(str("datatracker"), syslog.LOG_PID, syslog.LOG_USER)