SI-8525 Add -Xlint:-warn-missing-interpolator

Turn off lint warnings with negating prefix, and add a lint-only
warning for the infamously nagging "Did you forget the interpolator?"

That message is made more dignified.

Without `-Xlint:false`, there is no mechanism to turn off
anonymous linters once `-Xlint` is selected.

1 files changed, 7 insertions, 4 deletions

diff --git a/test/files/neg/t8610.check b/test/files/neg/t8610.check
index 7a18e55127..334a947549 100644
--- a/test/files/neg/t8610.check
+++ b/test/files/neg/t8610.check
@@ -1,15 +1,18 @@
-t8610.scala:3: warning: `$name` looks like an interpolated identifier! Did you forget the interpolator?
+t8610.scala:5: warning: possible missing interpolator: detected interpolated identifier `$name`
   def x = "Hi, $name"   // missing interp
           ^
-t8610.scala:5: warning: Adapting argument list by creating a 2-tuple: this may not be what you want.
+t8610.scala:7: warning: Adapting argument list by creating a 2-tuple: this may not be what you want.
         signature: X.f(p: (Int, Int)): Int
   given arguments: 3, 4
  after adaptation: X.f((3, 4): (Int, Int))
   def g = f(3, 4)       // adapted
            ^
-t8610.scala:6: warning: side-effecting nullary methods are discouraged: suggest defining as `def u()` instead
+t8610.scala:9: warning: private[this] value name in class X shadows mutable name inherited from class Named.  Changes to name will not be visible within class X - you may want to give them distinct names.
+  override def toString = name // shadowing mutable var name
+                          ^
+t8610.scala:8: warning: side-effecting nullary methods are discouraged: suggest defining as `def u()` instead
   def u: Unit = ()      // unitarian universalist
       ^
 error: No warnings can be incurred under -Xfatal-warnings.
-three warnings found
+four warnings found
 one error found