* set_cur_block(block). If several blocks are constructed in parallel block
* switches need to be performed constantly.
*
- * To generate a Block node (with the comfortable interface) it's predecessor
+ * To generate a Block node (with the comfortable interface), its predecessor
* control flow nodes need not be known. In case of cyclic control flow these
* can not be known when the block is constructed. With add_immBlock_pred(block,
* cfnode) predecessors can be added to the block. If all predecessors are