[NTG-context] Bug in verbatim wrapping examples on wiki

[Hugo Landau]

On this page of the wiki there is an example for wrapping long words,
like long hexadecimal strings:

https://wiki.contextgarden.net/Wrapping

This example is buggy because it deletes one character at the point that
it is wrapped.

In the example given, running context turns '257a410' into '257410'.

The DNA example below it exhibits the same problem.

Anyone have a solution?