renameing to match expressions

test/cases/small_conditional/if_end.tst

@@ -0,0 +1,11 @@
+if(0)
+  42
+end
+-- -- --
+s(:expressions, 
+  s(:if, 
+    s(:condition, 
+      s(:int,  0)), 
+    s(:if_true, 
+      s(:int,  42)), 
+    s(:if_false,  nil)))

test/cases/small_conditional/if_end_expressions.tst

@@ -0,0 +1,18 @@
+if(3 > var)
+  Object.initialize(3)
+end
+-- -- --
+s(:expressions, 
+  s(:if, 
+    s(:condition, 
+      s(:operator,  ">", 
+        s(:int,  3), 
+        s(:name,  :var))), 
+    s(:if_true, 
+      s(:call, 
+        s(:name,  :initialize), 
+        s(:arguments, 
+          s(:int,  3)), 
+        s(:receiver, 
+          s(:module,  "Object")))), 
+    s(:if_false,  nil)))