doc: wording fix

Bruce Momjian <bruce@momjian.us>

Commit: ee2b0a392ff843a7f8539f907498d550bfe51462
Author: Bruce Momjian <bruce@momjian.us>
Date: 2018-09-07T00:42:24Z
Releases: 10.6
doc:  wording fix

Author: Liudmila Mantrova

Backpatch-through: 9.6 and 10 only

Files

PathChange+/−
doc/src/sgml/pgtrgm.sgml modified +1 −1

Documentation touched