diff --git a/src/regexp/syntax/doc.go b/src/regexp/syntax/doc.go
index efc0b43..b3f9136 100644
--- a/src/regexp/syntax/doc.go
+++ b/src/regexp/syntax/doc.go
@@ -66,7 +66,7 @@
 
 Empty strings:
   ^              at beginning of text or line (flag m=true)
-  $              at end of text (like \z not Perl's \Z) or line (flag m=true)
+  $              at end of text (like \z not \Z) or line (flag m=true)
   \A             at beginning of text
   \b             at ASCII word boundary (\w on one side and \W, \A, or \z on the other)
   \B             not at ASCII word boundary
@@ -127,5 +127,6 @@
   [[:word:]]     word characters (== [0-9A-Za-z_])
   [[:xdigit:]]   hex digit (== [0-9A-Fa-f])
 
+Unicode character classes are those in unicode.Categories and unicode.Scripts.
 */
 package syntax