init-exe template: add flushing to the buffered writer

lib/init-exe/src/main.zig

@@ -4,14 +4,16 @@ pub fn main() !void {
     // Prints to stderr (it's a shortcut based on `std.io.getStdErr()`)
     std.debug.print("All your {s} are belong to us.\n", .{"codebase"});
 
-    // Prints to stdout
-    const unbuffered_out = std.io.getStdOut().writer();
-    const out = std.io.bufferedWriter(unbuffered_out).writer();
-    try out.print("Run `zig build test` to run the tests.\n", .{});
-
-    // Stdout is for the actual output of your application, for example if you
+    // stdout is for the actual output of your application, for example if you
     // are implementing gzip, then only the compressed bytes should be sent to
-    // stdout, not any debugging messages!
+    // stdout, not any debugging messages.
+    const stdout_file = std.io.getStdOut().writer();
+    var bw = std.io.bufferedWriter(stdout_file);
+    const stdout = bw.writer();
+
+    try stdout.print("Run `zig build test` to run the tests.\n", .{});
+
+    try bw.flush(); // don't forget to flush!
 }
 
 test "simple test" {