renameing to match expressions

test/cases/expressions/assignment.tst

@@ -1,6 +0,0 @@
-a = 5
--- -- --
-s(:expressions, 
-  s(:assign, 
-    s(:name,  :a), 
-    s(:int,  5)))

test/cases/expressions/two_different_ops.tst

@@ -1,8 +0,0 @@
-2 + 3 * 4
--- -- --
-s(:expressions, 
-  s(:operator,  "+", 
-    s(:int,  2), 
-    s(:operator,  "*", 
-      s(:int,  3), 
-      s(:int,  4))))

test/cases/expressions/two_different_ops_order.tst

@@ -1,8 +0,0 @@
-2 * 3 + 4
--- -- --
-s(:expressions, 
-  s(:operator,  "+", 
-    s(:operator,  "*", 
-      s(:int,  2), 
-      s(:int,  3)), 
-    s(:int,  4)))

test/cases/expressions/two_same_ops.tst

@@ -1,8 +0,0 @@
-2 + 3 + 4
--- -- --
-s(:expressions, 
-  s(:operator,  "+", 
-    s(:operator,  "+", 
-      s(:int,  2), 
-      s(:int,  3)), 
-    s(:int,  4)))