Almost backout afcd46716d6a which breaks _select_best raising an ambiguity exception in debug mode.
The problem is, before afcd4, *tests* ran in debug mode and we want
this (e.g. we want to show, rather than swallow, select ambigüities).
We juste replace the bogus __init__(vreg.config) by __init__(True), which is
practically equivalent and also much more clear.
[MESSAGES CONTROL]
disable-msg = C0301
[VARIABLES]
# Enable / disable this checker
enable-variables = yes
additional-builtins = _, display_name
[BASIC]
required-attributes=
attr-rgx = (w|[a-z_][a-z0-9_]{2,30})
variable-rgx = (w|[a-z_][a-z0-9_]{2,30})$
argument-rgx = (w|[a-z_][a-z0-9_]{2,30})$
[TYPECHECK]
generated-members=debug,info,notice,warning,error,critical,exception