autopkgtest: Make pycodestyle clean (--ignore=E501,W504)

britney2/policies/autopkgtest.py

@@ -243,7 +243,6 @@ class AutopkgtestPolicy(BasePolicy):
             # render HTML line for testsrc entry
             excuse.addhtml("autopkgtest for %s: %s" % (testname, ', '.join(html_archmsg)))
 
-
         if verdict != PolicyVerdict.PASS:
             # check for force-skiptest hint
             hints = self.britney.hints.search('force-skiptest', package=source_name, version=source_data_srcdist.version)
@@ -310,7 +309,7 @@ class AutopkgtestPolicy(BasePolicy):
         # serves no purpose. Just check some key packages which actually use
         # gcc during the test, and doxygen as an example for a libgcc user.
         if src.startswith('gcc-'):
-            if re.match('gcc-\d$', src):
+            if re.match(r'gcc-\d$', src):
                 # add gcc's own tests, if it has any
                 srcinfo = self.britney.sources['unstable'][src]
                 if 'autopkgtest' in srcinfo.testsuite:
@@ -742,4 +741,3 @@ class AutopkgtestPolicy(BasePolicy):
                     return True
 
         return False
-