Doc: correct misstatement about ltree label maximum length.

The documentation says that the max length is 255 bytes, but
code inspection says it's actually 255 characters; and relevant
lengths are stored as uint16 so that that works.

diff --git a/doc/src/sgml/ltree.sgml b/doc/src/sgml/ltree.sgml
index 0c74aa705e964804712a10ac0258a54f725fbc7a..2d539f23fd8fc86e76e9c0b00746d354db98d0a2 100644 (file)
--- a/doc/src/sgml/ltree.sgml
+++ b/doc/src/sgml/ltree.sgml
@@ -25,8 +25,8 @@
   
    A label is a sequence of alphanumeric characters
    and underscores (for example, in C locale the characters
-   A-Za-z0-9_ are allowed).  Labels must be less than 256 bytes
-   long.
+   A-Za-z0-9_ are allowed).
+   Labels must be less than 256 characters long.