-# A regular expression used in the internal-pager to determine quoted
-# sections of text in the body of a message.
+# A regular expression used in the internal pager to determine quoted
+# sections of text in the body of a message. Quoted text may be filtered
+# out using the <toggle-quoted> command, or colored according to the
+# ``color quoted'' family of directives.
+#
+# Higher levels of quoting may be colored differently (``color quoted1'',
+# ``color quoted2'', etc.). The quoting level is determined by removing
+# the last character from the matched text and recursively reapplying
+# the regular expression until it fails to produce a match.