Update docs/src/tutorial/caveats.rst

small grammar error/typo in doc

docs/src/tutorial/caveats.rst

@@ -7,7 +7,7 @@ for Python users, so this list may change in the future.
 
  - ``10**-2 == 0``, instead of ``0.01`` like in Python.
  - Given two typed ``int`` variables ``a`` and ``b``, ``a % b`` has the
-   same sign as the second argument (following Python semantics) rather then
+   same sign as the second argument (following Python semantics) rather than
    having the same sign as the first (as in C).  The C behavior can be 
    obtained, at some speed gain, by enabling the division directive. 
    (Versions prior to Cython 0.12. always followed C semantics.)