fixup! PyTest.summaryf: better detection of summary line

fix a wrong construct being syntax error on python2

nxdtest/__init__.py

@@ -499,7 +499,7 @@ class PyTest:
         # ...
         textv = out.splitlines()
         for l in reversed(textv):
-            if re.match(rb'^====* .*(failed|passed|skipped|error|no tests).* ====*$', l):
+            if re.match(br'^====* .*(failed|passed|skipped|error|no tests).* ====*$', l):
                 pytail = l
                 break
         else: