pgsql: Doc: tweak examples to silence line-too-long PDF build warnings.

Doc: tweak examples to silence line-too-long PDF build warnings.

In one or two places it seemed reasonable to modify the example so as
to shorten its output slightly; but for the most part I just added a
&zwsp; after 67 characters, which is the most we can fit on a line
of monospace text in A4 format.

Discussion: https://postgr.es/m/6916.1589146280@sss.pgh.pa.us

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/3d14c174cbbb6f83d8ac63fa7d0e1f42e0ae8d30

Modified Files
--------------
doc/src/sgml/bloom.sgml            |  8 ++++----
doc/src/sgml/datatype.sgml         |  2 +-
doc/src/sgml/ddl.sgml              |  4 ++--
doc/src/sgml/jit.sgml              |  4 ++--
doc/src/sgml/pageinspect.sgml      |  6 +++---
doc/src/sgml/parallel.sgml         |  2 +-
doc/src/sgml/perform.sgml          | 42 +++++++++++++++++++-------------------
doc/src/sgml/pgstatstatements.sgml | 24 +++++++++++-----------
doc/src/sgml/planstats.sgml        | 32 ++++++++++++++---------------
doc/src/sgml/ref/explain.sgml      |  4 ++--
doc/src/sgml/start.sgml            |  2 +-
doc/src/sgml/syntax.sgml           |  6 +++---
12 files changed, 68 insertions(+), 68 deletions(-)