cleanup: Fix typos in comments.

ir/ana/irscc.c

@@ -360,7 +360,7 @@ static inline void finish_scc(void)
 }
 
 /**
- * Check weather a given node represents the outer most Start
+ * Check whether a given node represents the outermost Start
  * block. In intra-procedural view this is the start block of the
  * current graph, in interprocedural view it is the start block
  * of the outer most graph.

ir/ir/irgraph.c

@@ -557,10 +557,8 @@ int node_is_in_irgs_storage(const ir_graph *irg, const ir_node *n)
 {
 	struct _obstack_chunk *p;
 
-	/*
-	 * checks weather the ir_node pointer is on the obstack.
-	 * A more sophisticated check would test the "whole" ir_node
-	 */
+	/* Check whether the ir_node pointer is on the obstack.
+	 * A more sophisticated check would test the "whole" ir_node. */
 	for (p = irg->obst->chunk; p; p = p->prev) {
 		if (((char *)p->contents <= (char *)n) && ((char *)n < (char *)p->limit))
 			return 1;