pgsql: Typo and spelling fixups for online checksums

Typo and spelling fixups for online checksums

A collection of spelling, wording and punctuation fixups for the code
documentation from postcommit review.

Author: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Tomas Vondra <tomas@vondra.me>
Reviewed-by: Ayush Tiwari <ayushtiwari.slg01@gmail.com>
Reviewed-by: SATYANARAYANA NARLAPURAM <satyanarlapuram@gmail.com>
Discussion: /messages/by-id/9197F930-DDEB-4CAC-82A2-16FEC715CCE8@yesql.se

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/381d19da1536bdbddb2f7ea1649b2f88933b8f1f

Modified Files
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src/backend/access/transam/xlog.c | 5 ++---
src/backend/postmaster/datachecksum_state.c | 12 ++++++------
2 files changed, 8 insertions(+), 9 deletions(-)