feat: keep the cursor position at the end of the input

Author: lambdalisue

denops/fall/component/input.ts

@@ -212,7 +212,7 @@ export class InputComponent extends BaseComponent {
       this.#offset,
       this.#cmdpos,
       this.#cmdline.length,
-      cmdwidth,
+      cmdwidth - 1,
       2,
     );