rustc: Lowercase "main function not found" error

src/comp/middle/typeck.rs

@@ -2698,7 +2698,7 @@ fn check_for_main_fn(tcx: &ty::ctxt, crate: &@ast::crate) {
     if !tcx.sess.get_opts().library {
         alt tcx.sess.get_main_id() {
           some(id) { check_main_fn_ty(tcx, id); }
-          none. { tcx.sess.span_err(crate.span, "Main function not found"); }
+          none. { tcx.sess.span_err(crate.span, "main function not found"); }
         }
     }
 }

src/test/compile-fail/missing-main.rs

@@ -1,2 +1,2 @@
-// error-pattern:Main function not found
+// error-pattern:main function not found
 fn mian() { }