Tiny typo in tutorial/memory_allocation.rst

docs/src/tutorial/memory_allocation.rst

@@ -22,7 +22,7 @@ management in C.
 Simple C values and structs (such as a local variable ``cdef double x``) are
 usually allocated on the stack and passed by value, but for larger and more
 complicated objects (e.g. a dynamically-sized list of doubles), the memory must
-be manually requested and released.  C provides the functions :c:func`malloc`,
+be manually requested and released.  C provides the functions :c:func:`malloc`,
 :c:func:`realloc`, and :c:func:`free` for this purpose, which can be imported
 in cython from ``clibc.stdlib``. Their signatures are: