diff --git a/src/library/Core.nim b/src/library/Core.nim
index f455891669..9d2fa587da 100644
--- a/src/library/Core.nim
+++ b/src/library/Core.nim
@@ -466,7 +466,7 @@ proc defineLibrary*() =
 
             print "good, the number is positive indeed. let's continue..."
             ..........
-            ensure.message: "Wrong calc" ->  0 = 1 + 1
+            ensure.that: "Wrong calc" ->  0 = 1 + 1
             ; >> Assertion | "Wrong calc": [0 = 1 + 1]
             ;        error |
         """:
@@ -1329,7 +1329,7 @@ proc defineLibrary*() =
         returns     = {Any},
         example     = """
             a: 2
-            print var 'a            ; a
+            print var 'a            ; 2
 
             f: function [x][x+2]
             print f 10              ; 12