Skip compat module when running flakes checks.

Python2-specific code fails on Python3 flakes and vice versa.

.travis.yml

@@ -22,7 +22,7 @@ install:
   - sudo rm -rf /dev/shm && sudo ln -s /run/shm /dev/shm
 script:
   - tox -e $TOX_ENV
-  - python -m pyflakes.__main__ $(git ls-files | grep -E "^isso/.+.py$")
+  - python -m pyflakes.__main__ $(git ls-files | grep -E "^isso/.+.py$" | grep -v "^isso/compat.py")
 notifications:
   irc:
     channels:

Makefile

@@ -34,9 +34,9 @@ init:
 
 check:
 	@echo "Python 2.x"
-	-@python2 -m pyflakes $(ISSO_PY_SRC)
+	@python2 -m pyflakes $(filter-out isso/compat.py,$(ISSO_PY_SRC))
 	@echo "Python 3.x"
-	-@python3 -m pyflakes $(ISSO_PY_SRC)
+	@python3 -m pyflakes $(filter-out isso/compat.py,$(ISSO_PY_SRC))
 
 isso/js/%.min.js: $(ISSO_JS_SRC) $(ISSO_CSS)
 	$(RJS) -o isso/js/build.$*.js out=$@