Description

When typing in inline math immediately before a display math block, if auto-fraction is enabled, typing a single / character triggers // instead.

To Reproduce

1. Make sure auto-fraction is enabled.
2. Type some display math block, e.g.

$$
x = 5
$$

In a line immediately before the display math block, type mk to trigger inline math, then type /.

This results in

$//$
$$
x = 5
$$

Expected Behavior

Only a single / character should appear:

$/$
$$
x = 5
$$