exercises/practice/anagram: add an append with instructions about the…

… order of the return values (#384)

exercises/practice/anagram/.docs/instructions.append.md

@@ -1,3 +1,6 @@
 # Instructions append
 
-The instructions above refer to "lists" in the general sense and not to the `list()` data type in R. Note that the tests for this exercise in R expect a character vector i.e. `c()` to be returned and not a `list()`.
+You must return the anagrams in the same order as they are listed in the candidate words.
+
+The instructions above refer to "lists" in the general sense and not to the `list()` data type in R.
+Note that the tests for this exercise in R expect a character vector i.e. `c()` to be returned and not a `list()`.