style cleanup: spelling.

also remove large, duplicate comments from sunsky.h

source/blender/python/intern/bpy_operator.c

@@ -433,7 +433,7 @@ static PyObject *pyop_getinstance(PyObject *UNUSED(self), PyObject *value)
 	op = PyMem_MALLOC(sizeof(wmOperator));
 	memset(op, 0, sizeof(wmOperator));
 #endif
-	BLI_strncpy(op->idname, op->idname, sizeof(op->idname)); /* incase its needed */
+	BLI_strncpy(op->idname, op->idname, sizeof(op->idname)); /* in case its needed */
 	op->type = ot;
 
 	RNA_pointer_create(NULL, &RNA_Operator, op, &ptr);