Additional support for ast expression in colorizer

[tristanlatr]

pydoctor/pydoctor/epydoc/markup/_pyval_repr.py

Line 498 in 9106701

# Nodes not explicitely handled that would be nice to handle.

There are still a couple of expressions type that we can’t colorize like lambda functions or f-strings.

[tristanlatr]

Also we should be able to do something better about expressions like something().name: it’s currently colorized using fallback unparse function from astor so no links are generated. But should be able to link to something instead of giving up.