Typos in Interacting with a Mathfield

[hexaron]

Hi guys,

there seem to be two typos in

cortexjs.io/src/_pages/mathlive-guide-interacting.md

Lines 280 to 284 in 1f9833f

	```js
	mf.setOptions({onExport: (mf, latex, range) =>
	"`" + mg.getValue(range, 'ascii-math') + "`".
	});
	```

For one, the . at the end of the line is incorrect syntax, second, the variable mg is not defined.
I believe the correct code should be:

mf.setOptions({onExport: (mg, latex, range) => 
  "`" + mg.getValue(range, 'ascii-math') + "`"
});

This also applies to the above two code snippets.

[arnog]

Good catch! Thanks for reporting it. Fixed now.