Fix bad indentation in a pyximport test

The indentation was inadvertently broken when expanding tabs in
e908c0b9.

Fixes:

    $ python pyximport/test/test_reload.py
      File "pyximport/test/test_reload.py", line 23
        assert hello.x == 1
        ^
    IndentationError: unexpected indent

pyximport/test/test_reload.py

@@ -20,7 +20,7 @@ def test():
     hello_file = os.path.join(tempdir, "hello.pyx")
     open(hello_file, "w").write("x = 1; print x; before = 'before'\n")
     import hello
-        assert hello.x == 1
+    assert hello.x == 1
 
     time.sleep(1) # sleep to make sure that new "hello.pyx" has later
               # timestamp than object file.