asdfghjkl.js: Remove `let` blockasdfghjkl--fix-block-syntax-errors

`let` blocks of the form

    let (var1 [= value1] [, var2 [= value2]] [, ..., varN [= valueN]]) block;

are non-standard, as specified in the following sections of the Mozilla
Developer Network page on `let`:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/let#Non-standard_let_extensions
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/let#let_blocks

Removing the `let` block here for forward compatibility.

This change also gets rid of the `self` variable created inside the
`let` block, using an arrow function instead to obviate the need to save
a `this` reference.

1 files changed, 4 insertions, 4 deletions

diff --git a/asdfghjkl.js b/asdfghjkl.js
index 5364305..d2bfc8f 100644
--- a/asdfghjkl.js
+++ b/asdfghjkl.js
@@ -98,10 +98,10 @@ let PLUGIN_INFO = xml`
   function around (obj, name, func) {
     let next = obj[name];
     obj[name] = function () {
-      let (self = this, args =  Array.from(arguments))
-        func.call(self,
-                  function () next.apply(self, args),
-                  args);
+      let args = Array.from(arguments);
+      func.call(this,
+                () => next.apply(this, args),
+                args);
     }
   }