Fix typo and case in messages

Follow up to dc2123400

Kyotaro Horiguchi

Discussion: https://postgr.es/m/20231222.154939.1509525390095583358.horikyota.ntt@gmail.com
Discussion: https://postgr.es/m/20231225.145124.1745560266993421173.horikyota.ntt@gmail.com

src/backend/backup/basebackup_incremental.c

@@ -575,7 +575,7 @@ PrepareForIncrementalBackup(IncrementalBackupInfo *ib,
 								tle->tli,
 								LSN_FORMAT_ARGS(tli_start_lsn),
 								LSN_FORMAT_ARGS(tli_end_lsn)),
-						 errdetail("The first unsummarized LSN is this range is %X/%X.",
+						 errdetail("The first unsummarized LSN in this range is %X/%X.",
 								   LSN_FORMAT_ARGS(tli_missing_lsn))));
 		}
 

src/bin/pg_combinebackup/pg_combinebackup.c

@@ -538,7 +538,7 @@ check_control_files(int n_backups, char **backup_dirs)
 
 		/* Control file contents not meaningful if CRC is bad. */
 		if (!crc_ok)
-			pg_fatal("%s: crc is incorrect", controlpath);
+			pg_fatal("%s: CRC is incorrect", controlpath);
 
 		/* Can't interpret control file if not current version. */
 		if (control_file->pg_control_version != PG_CONTROL_VERSION)