pgsql: Small punctuation fixes

Small punctuation fixes

Branch
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REL9_2_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/53c0ccc8d520ce1a65bc81edbef78223d8222124

Modified Files
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src/bin/pg_basebackup/pg_receivexlog.c | 3 ++-
src/bin/pg_basebackup/receivelog.c | 6 +++---
2 files changed, 5 insertions(+), 4 deletions(-)