avoid BeautifulSoup warning output since v4.9.3 (#1)

https://stackoverflow.com/questions/36039724/suppress-warning-of-url-in-beautifulsoup/78445796#78445796

feed2toot/message.py

@@ -18,6 +18,11 @@
 # standard libraires imports
 import logging
 
+# avoid BeautifulSoup warning output since v4.9.3
+# https://stackoverflow.com/questions/36039724/suppress-warning-of-url-in-beautifulsoup/78445796#78445796
+import warnings
+from bs4 import MarkupResemblesLocatorWarning
+
 # external liraries imports
 from bs4 import BeautifulSoup
 
@@ -26,6 +31,10 @@ from feed2toot.addtags import AddTags
 from feed2toot.removeduplicates import RemoveDuplicates
 from feed2toot.tootpost import TootPost
 
+# avoid BeautifulSoup warning output since v4.9.3
+# https://stackoverflow.com/questions/36039724/suppress-warning-of-url-in-beautifulsoup/78445796#78445796
+warnings.filterwarnings("ignore", category=MarkupResemblesLocatorWarning)
+
 def build_message(entrytosend, tweetformat, rss, tootmaxlen, notagsintoot):
     '''populate the rss dict with the new entry'''
     tweetwithnotag = tweetformat.format(**entrytosend)