Disable use of 'tidy' during check phase

os-autoinst.spec

@@ -159,6 +159,10 @@ find %{buildroot} -depth -type d -and -not -name distri -exec rmdir {} \;
 export NO_BRP_STALE_LINK_ERROR=yes
 
 %check
+# there's no point in checking code style at package build time,
+# and different versions of 'tidy' have different opinions so the
+# same code can pass for one Fedora release but fail for another
+sed -i -e '/tidy --check/d' Makefile
 make check VERBOSE=1
 
 %post openvswitch