Cleanup: use term init instead of initialize/initialise

The abbreviation 'init' is brief, unambiguous and already used
in thousands of places, also initialize is often accidentally
written with British spelling.

source/blender/freestyle/intern/python/BPy_Freestyle.cpp

@@ -264,7 +264,7 @@ static PyObject *Freestyle_evaluateCurveMappingF(PyObject * /*self*/, PyObject *
     return NULL;
   }
   cumap = (CurveMapping *)py_srna->ptr.data;
-  BKE_curvemapping_initialize(cumap);
+  BKE_curvemapping_init(cumap);
   /* disable extrapolation if enabled */
   if ((cumap->flag & CUMA_EXTEND_EXTRAPOLATE)) {
     cumap->flag &= ~CUMA_EXTEND_EXTRAPOLATE;