Restyled by autopep8

Author: restyled-commits

tools/gen_api.py

@@ -274,7 +274,7 @@ def gen_cython(lines: Sequence[str], fun_prefix: str) -> List[str]:
 
     if install_handlers:
         install_handlers = (
-                ["cdef void install_handlers(Tox *ptr):"] + install_handlers)
+            ["cdef void install_handlers(Tox *ptr):"] + install_handlers)
     return extern + [""] + handlers + [""] + install_handlers