pgsql: Unify find_other_exec() error messages

Unify find_other_exec() error messages

There were a few different ways to line-wrap the error messages. Make
them all the same, and use placeholders for the actual program names,
to save translation work.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/7666ef313dcc22c8716ee74dfefab8e5ea628678

Modified Files
--------------
src/bin/initdb/initdb.c | 8 ++++----
src/bin/pg_ctl/pg_ctl.c | 3 +--
src/bin/pg_dump/pg_dumpall.c | 8 ++++----
src/bin/pg_rewind/pg_rewind.c | 16 ++++++++--------
src/bin/pg_verifybackup/pg_verifybackup.c | 8 ++++----
5 files changed, 21 insertions(+), 22 deletions(-)