ScalaSettings withAbbreviation not accepted

[bishabosha]

Minimized code

in this line we can see that the -Xsemanticdb setting has an abbreviation -Ysemanticdb:

https://github.com/lampepfl/dotty/blob/bfb0b8194a3e96d08abf8d96f3cba8d701febc3e/compiler/src/dotty/tools/dotc/config/ScalaSettings.scala#L138

However invoking the compiler with -Ysemanticdb warns that is is an invalid flag and the setting is not active.

Output

$>scalac -Ysemanticdb
bad option '-Ysemanticdb' was ignored
Usage: scalac <options> <source files>
...

Expectation

passing -Ysemanticdb should act like -Xsemanticdb

linked to #10844, but is more general than that, e.g. -classpath has an abbreviation -cp that is also not accepted

[som-snytt]

#10810 has a smaller issue number.

[bishabosha]

Thanks for noticing