stop uname.c adding trailing whitespace

Notes:
Wed May 5 18:19:00 EDT 2010 geoff
    fixed differently.


Reference: /n/sources/patch/applied/uname-trail
Date: Fri Apr 23 18:08:00 CES 2010
Signed-off-by: steve@quintile.net
Reviewed-by: geoff

--- /sys/src/ape/cmd/uname.c	Fri Apr 23 18:07:42 2010
+++ /sys/src/ape/cmd/uname.c	Fri Apr 23 18:07:40 2010
@@ -19,6 +19,7 @@
 
 main(int argc, char **argv)
 {
+	char *pad;
 	struct utsname u;
 
 	uname(&u);
@@ -26,25 +27,32 @@
 		printf("%s\n", u.sysname);
 		exit(0);
 	}
-	ARGBEGIN {
+	pad = "";
+	ARGBEGIN{
 	case 'a':
-		printf("%s %s %s %s %s ", u.sysname, u.nodename,
+		printf("%s%s %s %s %s %s", pad, u.sysname, u.nodename,
 			u.release, u.version, u.machine);
+		pad = " ";
 		break;
 	case 'm':
-		printf("%s ", u.machine);
+		printf("%s%s", pad, u.machine);
+		pad = " ";
 		break;
 	case 'n':
-		printf("%s ", u.nodename);
+		printf("%s%s", pad, u.nodename);
+		pad = " ";
 		break;
 	case 'r':
-		printf("%s ", u.release);
+		printf("%s%s", pad, u.release);
+		pad = " ";
 		break;
 	case 's':
-		printf("%s ", u.sysname);
+		printf("%s%s", pad, u.sysname);
+		pad = " ";
 		break;
 	case 'v':
-		printf("%s ", u.version);
+		printf("%s%s", pad, u.version);
+		pad = " ";
 		break;
 	} ARGEND
 	printf("\n");