Common transposition errors are not covered

## Description

Some common tranposition errors do not generate the correct answer. See examples below. I tested these against the editor on the home page.

## Examples

I tried some simple errors like:

`teh` instead of `the`


and `recieved` instead of `received`.


In either case the offered corrections did not include the correct answer.

Reproduce the issue in the editor on the home page using “teh” and “recieved” and compare the offered corrections with the expected words. Trace the transposition-error handling from that reproduction; the work is done when both examples include “the” and “received” among the offered corrections.

Written by the indexing model from the issue text.