examples: Reformat usage() function

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>

examples/sample.c

@@ -76,8 +76,10 @@ static void add_cmd(char *cmd){
     cmds[n]=strdup(cmd);
 }
 
-static void usage(){
-    fprintf(stderr,"Usage : ssh [options] [login@]hostname\n"
+static void usage(void)
+{
+    fprintf(stderr,
+            "Usage : ssh [options] [login@]hostname\n"
             "sample client - libssh-%s\n"
             "Options :\n"
             "  -l user : log in as user\n"
@@ -90,8 +92,9 @@ static void usage(){
 #ifndef _WIN32
             "  -T proxycommand : command to execute as a socket proxy\n"
 #endif
-    		,
+            "\n",
             ssh_version(0));
+
     exit(0);
 }