- * Without the ":", since this is a multi-letter prefix, Xapian
- * will add a colon itself if the first letter of the path is
- * upper-case ASCII. Including the ":" forces there to always be a
- * colon, which keeps our own logic simpler.
+ * Unconditionally add ':' to reduce potential ambiguity with
+ * overlapping prefixes and/or terms that start with capital
+ * letters. See Xapian document termprefixes.html for related
+ * discussion.