pgsql: pg_waldump: Fix --bkp-details to not issue spurious newlines for

pg_waldump: Fix --bkp-details to not issue spurious newlines for FPWs.

The additional newline seems to have accidentally been introduced in
2c03216d831, in 9.5. The newline is only issued when an FPW is
present for the block reference.

While there could be an argument that removing the newlines in the
back branches could cause a problem for somebody parsing the
pg_waldump output, the likelihood of that seems small enough. It seems
at least equally likely that the randomness of when newlines are
issued causes problems.

Author: Andres Freund
Discussion: https://postgr.es/m/20191029233341.4gnyau7e5v2lh5sc@alap3.anarazel.de
Backpatch: 9.5, like 2c03216d831.

Branch
------
REL_11_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/3b24cf732e1746f84271f3a4f84288d146203cc3

Modified Files
--------------
src/bin/pg_waldump/pg_waldump.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)