-can specify flags. There are seven possible flags, represented by the
-characters @samp{1}, @samp{2}, @samp{3}, @samp{4}, @samp{b}, @samp{n},
-and @samp{p}.
-
- All the flags except @samp{n} and @samp{p} are used to describe
-multi-character comment delimiters. The digit flags indicate that a
-character can @emph{also} be part of a comment sequence, in addition to
-the syntactic properties associated with its character class. The flags
-are independent of the class and each other for the sake of characters
-such as @samp{*} in C mode, which is a punctuation character, @emph{and}
-the second character of a start-of-comment sequence (@samp{/*}),
-@emph{and} the first character of an end-of-comment sequence
-(@samp{*/}).
+can specify flags. There are eight possible flags, represented by the
+characters @samp{1}, @samp{2}, @samp{3}, @samp{4}, @samp{b}, @samp{c},
+@samp{n}, and @samp{p}.
+
+ All the flags except @samp{p} are used to describe comment
+delimiters. The digit flags are used for comment delimiters made up
+of 2 characters. They indicate that a character can @emph{also} be
+part of a comment sequence, in addition to the syntactic properties
+associated with its character class. The flags are independent of the
+class and each other for the sake of characters such as @samp{*} in
+C mode, which is a punctuation character, @emph{and} the second
+character of a start-of-comment sequence (@samp{/*}), @emph{and} the
+first character of an end-of-comment sequence (@samp{*/}). The flags
+@samp{b}, @samp{c}, and @samp{n} are used to qualify the corresponding
+comment delimiter.