Standardize punctuation in redis-cli help.

Right there is a mix of help entries ending with periods or
without periods. This standardizes the end of command as without
periods, which seems to be the general custom in most unix tools,
at least.

src/redis-cli.c

@@ -712,17 +712,17 @@ static void usage() {
 "  -a <password>    Password to use when connecting to the server\n"
 "  -r <repeat>      Execute specified command N times\n"
 "  -i <interval>    When -r is used, waits <interval> seconds per command.\n"
-"                   It is possible to specify sub-second times like -i 0.1.\n"
+"                   It is possible to specify sub-second times like -i 0.1\n"
 "  -n <db>          Database number\n"
 "  -x               Read last argument from STDIN\n"
 "  -d <delimiter>   Multi-bulk delimiter in for raw formatting (default: \\n)\n"
 "  -c               Enable cluster mode (follow -ASK and -MOVED redirections)\n"
 "  --raw            Use raw formatting for replies (default when STDOUT is not a tty)\n"
-"  --latency        Enter a special mode continuously sampling latency.\n"
-"  --slave          Simulate a slave showing commands received from the master.\n"
-"  --pipe           Transfer raw Redis protocol from stdin to server.\n"
-"  --bigkeys        Sample Redis keys looking for big keys.\n"
-"  --eval <file>    Send an EVAL command using the Lua script at <file>.\n"
+"  --latency        Enter a special mode continuously sampling latency\n"
+"  --slave          Simulate a slave showing commands received from the master\n"
+"  --pipe           Transfer raw Redis protocol from stdin to server\n"
+"  --bigkeys        Sample Redis keys looking for big keys\n"
+"  --eval <file>    Send an EVAL command using the Lua script at <file>\n"
 "  --help           Output this help and exit\n"
 "  --version        Output version and exit\n"
 "\n"