Repos have syntax errors

srush

Several of the repos that I have played with start with a syntax error. Think we should avoid syntax errors when possible.

ImportError while loading conftest '/testbed/tests/conftest.py'.
tests/conftest.py:5: in <module>
    from jinja2 import loaders
src/jinja2/__init__.py:6: in <module>
    from .bccache import BytecodeCache as BytecodeCache
E     File "/testbed/src/jinja2/bccache.py", line 26
E       bc_version = 5
E   IndentationError: expected an indented block after class definition on line 25