tweaks examples to match more consistent style

Author: rwtolbert

examples/eachk.janet

@@ -1,11 +1,11 @@
 # keys for tuple/array are 0-based index
 # prints 0 1 2 3 4
-(eachk i [1 2 3 4 5] (prin i " "))
+(eachk i [:a :b :c :d :e] (prin i " "))
 
 # prints 0 1 2 3 4
-(eachk i @[1 2 3 4 5] (prin i " "))
+(eachk i @["a" "b" "c" "d" "e"] (prin i " "))
 
-# keys table/struct, but maybe not in order
+# prints keys in table/struct in an unspecified order
 # prints :b :a
 (eachk k {:a 1 :b 2} (prinf "%v " k))