Fixing bug

[#448679] Left to right

* Python/compile.c
  (com_dictmaker): Reordered evaluation of dictionaries to follow strict
  LTR evaluation.

* Lib/compiler/pycodegen.py
  (CodeGenerator.visitDict): Reordered evaluation of dictionaries to
  follow strict LTR evaluation.

* Doc/ref/ref5.tex
  Documented the general LTR evaluation order idea.

* Misc/NEWS
  Documented change in evaluation order of dictionaries.
diff --git a/Python/compile.c b/Python/compile.c
index b438ce4..1755521 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -1529,9 +1529,9 @@
 		   It wants the stack to look like (value) (dict) (key) */
 		com_addbyte(c, DUP_TOP);
 		com_push(c, 1);
-		com_node(c, CHILD(n, i+2)); /* value */
-		com_addbyte(c, ROT_TWO);
 		com_node(c, CHILD(n, i)); /* key */
+		com_node(c, CHILD(n, i+2)); /* value */
+		com_addbyte(c, ROT_THREE);
 		com_addbyte(c, STORE_SUBSCR);
 		com_pop(c, 3);
 	}