Fix typo in Scaladoc
SI-7344 Specialize methods in private scopes

This performs method specialization inside a scope other than a {class,
trait, object}: could be another method or a value. This specialization
is much simpler, since there is no need to record the new members in
the class signature, their signatures are only visible locally.
It works according to the usual logic:
 - we use normalizeMember to create the specialized symbols
 - we leave DefDef stubs in the tree that are later filled in by tree
duplication and adaptation

The solution is limited by SI-7579: since the duplicator loses the sym
annotations when duplicating, this expansion and rewiring can only take
place in code that has not been subject to duplication. You can see the
test case for an example.

Review by @dragos, @paulp or @axel22.
Merge pull request #2683 from VladUreche/issue/7344-master

SI-7344 Specialize methods in private scopes
Merge pull request #2673 from greenrd/patch-1

Fix typo in Scaladoc
Merge pull request #2676 from soc/SI-7511

SI-7511 Remove indirection of numeric methods
Merge pull request #2681 from soc/SI-7590

SI-7590 TreeSet should fail fast if Ordering is null
SI-7591 Remove usage demo code
SI-7591 Minor cleanups
SI-7591 Make s.t.p.n.ConsoleRunner use s.t.c.CommandLine

Before this change s.t.n.u.CommandLine was used instead.

Remove command-line options --ansi, --buildmanager, --show-log
which don't have any effect and don't seem to be used anywhere.