rustc: Fix formatting of --help

Author: brson

src/librustc/rustc.rc

@@ -140,10 +140,10 @@ pub fn version(argv0: &str) {
 
 pub fn usage(argv0: &str) {
     let message = fmt!("Usage: %s [OPTIONS] INPUT", argv0);
-    io::println(fmt!("%s \
-                Additional help: \
-    -W help             Print 'lint' options and default settings \
-    -Z help             Print internal options for debugging rustc",
+    io::println(fmt!("%s\
+Additional help:
+    -W help             Print 'lint' options and default settings
+    -Z help             Print internal options for debugging rustc\n",
                      groups::usage(message, optgroups())));
 }