doc: Fix missing or duplicate closing parentheses in some documents

[Daisuke Higuchi]

Hi
I found that the parentheses seemed not to be handled correctly in
following 3 documents, so I attach the patch for this.

- closing parentheses is missing
  - doc/src/sgml/client-auth.sgml

- closing parentheses is duplicate
  - doc/src/sgml/ltree.sgml
  - doc/src/sgml/trigger.sgml

Regards

doc_fix_missing_parentheses_client-auth.patch
Description: Binary data

doc_fix_duplicate_parentheses_trigger.patch
Description: Binary data

doc_fix_duplicate_parentheses_ltree.patch
Description: Binary data