Add missing article

Noticed while reviewing nearby text

diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml
index 0bed5b9a479b1e5ee8079dd6bb6672cde4759722..a1b1ec7bf588bc4197483c55e9288c84ff24dbfa 100644 (file)
--- a/doc/src/sgml/ddl.sgml
+++ b/doc/src/sgml/ddl.sgml
@@ -3061,7 +3061,7 @@ CREATE TABLE measurement (
        parent.  Note that specifying bounds such that the new partition's
        values will overlap with those in one or more existing partitions will
        cause an error.  Inserting data into the parent table that does not map
-       to one of the existing partitions will cause an error; appropriate
+       to one of the existing partitions will cause an error; an appropriate
        partition must be added manually.