Non printable characters aren't substituted.

[Phlosioneer]

In editorUpdateRow, a check is never performed to find non-printable characters. However, the function should replace non-printable characters with '?'.

[practicalswift]

@Phlosioneer Good point! Addressed in commit https://github.com/kilofork/kilo/commit/2173454e3daed43c0be89f892ec0fd68276a7f78 in the kilofork project :-)

[clort81]

I rather enjoy being able to see colored text in kilo. It just needs to be preserved when editing.