Flow version: 0.100.0

Expected behavior

Given the following input:

// @flow
// п
function foo(bar: number) {}

flow-remove-types should produce:

//      
// п
function foo(bar        ) {}

Actual behavior

It produces invalid JS:

//      
// п
function foo(bar:         {}

The non-latin character is the trigger. Without it, it works correctly. This seems like quite a serious bug considering how common it is to use non-latin characters in comments (e.g. comment in other languages, draw arrows etc.).

cc @mroch @samwgoldman