Add format script.

format.ts

@@ -0,0 +1,13 @@
+#!/usr/bin/env deno --allow-run
+
+import { exit, run } from "deno";
+
+async function main() {
+  const prettier = run({
+    args: ["bash", "-c", "prettier --write *.ts **/*.ts"]
+  });
+  const s = await prettier.status();
+  exit(s.code);
+}
+
+main();

net/bufio.ts

@@ -185,7 +185,6 @@ export class BufReader implements Reader {
     return [nread, nread < p.length ? "EOF" : null];
   }
 
-
   /** Returns the next byte [0, 255] or -1 if EOF. */
   async readByte(): Promise<number> {
     while (this.r === this.w) {