Variable value includes type

[int19h]

This is a quirk of pydevd - when reporting the value of the variable, it includes type as part of the value. E.g. given x = 123, the value is reported as int: 123. These are displayed as is in PyDev, but for VSC and especially VS (which has a separate type column), we don't want the type - it's redundant, and gets in the way of editing variable value.

It looks like the format is uniform, so we can just drop the part before the colon.

[int19h]

It looks like strings are special-cased in that they're not quoted - x = 'foo\nbar' becomes str: foo\nbar!

[int19h]

Turns out that pydevd computes values via str, implicitly:

                value = '%s: %s' % (cName, v)

Hence why strings aren't quoted (but e.g. bytes are). This would present a problem for some other types as well, and would deviate from our existing behavior. What we really want is repr.

The good news is that pydevd provides a way to register a custom value representation provider (StrPresentationProvider). So we can just plug in our existing SafeRepr implementation directly.