pad - string padding on both sides

snippets/pad.md

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+### pad
+
+Pads `string` on the left and right side if it's shorter than `length`.
+String is *NOT* truncated on both sides if it exceeds length.
+
+```js
+const pad = (string, length = 8, char = ' ') =>
+  string.padStart((string.length + length) / 2, char).padEnd(length, char);
+module.exports = pad;
+```
+
+```js
+pad('cat'); //> '  cat   '
+pad(String(42), 4, '0'); //> '004200'
+pad('foobar', 3); //> 'foobar'
+```