Small cleanups of contrib --help output

contrib/pg_archivecleanup/pg_archivecleanup.c

@@ -248,9 +248,9 @@ usage(void)
 	printf("Usage:\n");
 	printf("  %s [OPTION]... ARCHIVELOCATION OLDESTKEPTWALFILE\n", progname);
 	printf("\nOptions:\n");
-	printf("  -d                 generates debug output (verbose mode)\n");
-	printf("  -n                 shows the names of the files that would have been removed (dry-run)\n");
- 	printf("  -x EXT             cleanup files if they have this same extension\n");
+	printf("  -d         generate debug output (verbose mode)\n");
+	printf("  -n         dry run, show the names of the files that would be removed\n");
+	printf("  -x EXT     clean up files if they have this extension\n");
 	printf("  --help     show this help, then exit\n");
 	printf("  --version  output version information, then exit\n");
 	printf("\n"

contrib/pg_standby/pg_standby.c

@@ -517,16 +517,16 @@ usage(void)
 	printf("Usage:\n");
 	printf("  %s [OPTION]... ARCHIVELOCATION NEXTWALFILE XLOGFILEPATH [RESTARTWALFILE]\n", progname);
 	printf("\nOptions:\n");
-	printf("  -c                 copies file from archive (default)\n");
+	printf("  -c                 copy file from archive (default)\n");
 	printf("  -d                 generate lots of debugging output (testing only)\n");
-	printf("  -k NUMFILESTOKEEP  if RESTARTWALFILE not used, removes files prior to limit\n"
+	printf("  -k NUMFILESTOKEEP  if RESTARTWALFILE is not used, remove files prior to limit\n"
 		   "                     (0 keeps all)\n");
 	printf("  -l                 does nothing; use of link is now deprecated\n");
 	printf("  -r MAXRETRIES      max number of times to retry, with progressive wait\n"
 		   "                     (default=3)\n");
 	printf("  -s SLEEPTIME       seconds to wait between file checks (min=1, max=60,\n"
 		   "                     default=5)\n");
-	printf("  -t TRIGGERFILE     defines a trigger file to initiate failover (no default)\n");
+	printf("  -t TRIGGERFILE     trigger file to initiate failover (no default)\n");
 	printf("  -w MAXWAITTIME     max seconds to wait for a file (0=no limit) (default=0)\n");
 	printf("  --help             show this help, then exit\n");
 	printf("  --version          output version information, then exit\n");

contrib/pgbench/pgbench.c

@@ -357,7 +357,7 @@ usage(const char *progname)
 		   "  -f FILENAME  read transaction script from FILENAME\n"
 		   "  -j NUM       number of threads (default: 1)\n"
 		   "  -l           write transaction times to log file\n"
-		   "  -M {simple|extended|prepared}\n"
+		   "  -M simple|extended|prepared\n"
 		   "               protocol for submitting queries to server (default: simple)\n"
 		   "  -n           do not run VACUUM before tests\n"
 		   "  -N           do not update tables \"pgbench_tellers\" and \"pgbench_branches\"\n"