Merge pull request #2082 from ronaldxs/fix-regex-pre-defined-character-classes

Update Language/regexes.pod6.  Fix confusing sentence about zero-width assertions

Author: JJ

doc/Language/regexes.pod6

@@ -238,10 +238,10 @@ Examples of word characters:
 
 =end table
 
-Note that the last three character classes are so called zero-width
-assertions, which do not really match a character.
+Note that the character classes C«<same>», C«<wb>» and C«<ww>» are
+so called zero-width assertions, which do not really match a
+character.
 
-X<Unicode character properties>
 =head2 X«Unicode Properties|regex,<:property>»
 
 The character classes mentioned so far are mostly for convenience;