First batch of neg -> warn test changes

Author: szymon-rd

tests/neg/i10247.scala

@@ -0,0 +1,6 @@
+-- Error: tests/neg/i11225b.scala:6:26 ---------------------------------------------------------------------------------
+6 |  private var cached: A = _ // error
+  |                          ^
+  |                          `= _` has been deprecated; use `= uninitialized` instead.
+  |                          `uninitialized` can be imported with `scala.compiletime.uninitialized`.
+  |                          This construct can be rewritten automatically under -rewrite -source 3.4-migration.

tests/neg/i10930.scala

@@ -1,4 +1,4 @@
-//> using options -source future -deprecation -Xfatal-warnings
+//> using options -source future -deprecation
 
 import compiletime.uninitialized
 
@@ -10,3 +10,4 @@ class Memo[A](x: => A):
       known = true
       cached = x
     cached
+

tests/neg/i10994.scala

@@ -1,32 +1,33 @@
--- Error: tests/neg/i17612b/i17612b.scala:21:15 ------------------------------------------------------------------------
-21 |	class Derived(x : Int, x3: Int, y: Int, z2: Int) extends BaseB, BaseC(x3), Base(x, y + 1, z2): // error // error / for x, y translated to private[this] x field & shadowing var Base.x, Base.y
+-- Warning: tests/neg/i17612b/i17612b.scala:21:15 ----------------------------------------------------------------------
+21 |	class Derived(x : Int, x3: Int, y: Int, z2: Int) extends BaseB, BaseC(x3), Base(x, y + 1, z2): // warn // warn / for x, y translated to private[this] x field & shadowing var Base.x, Base.y
    |	              ^
    |	              value x in class Derived shadows field x inherited from trait Base
--- Error: tests/neg/i17612b/i17612b.scala:21:33 ------------------------------------------------------------------------
-21 |	class Derived(x : Int, x3: Int, y: Int, z2: Int) extends BaseB, BaseC(x3), Base(x, y + 1, z2): // error // error / for x, y translated to private[this] x field & shadowing var Base.x, Base.y
+-- Warning: tests/neg/i17612b/i17612b.scala:21:33 ----------------------------------------------------------------------
+21 |	class Derived(x : Int, x3: Int, y: Int, z2: Int) extends BaseB, BaseC(x3), Base(x, y + 1, z2): // warn // warn / for x, y translated to private[this] x field & shadowing var Base.x, Base.y
    |	                                ^
    |	                                value y in class Derived shadows field y inherited from trait Base
--- Error: tests/neg/i17612b/i17612b.scala:23:2 -------------------------------------------------------------------------
-23 |		private val shadowed2 = 2 + 2 // error (In Scala 2 we cannot do that got the warning)
+-- Warning: tests/neg/i17612b/i17612b.scala:23:2 -----------------------------------------------------------------------
+23 |		private val shadowed2 = 2 + 2 // warn (In Scala 2 we cannot do that got the warning)
    |		^
    |		value shadowed2 in class Derived shadows field shadowed2 inherited from trait Base
--- Error: tests/neg/i17612b/i17612b.scala:24:2 -------------------------------------------------------------------------
-24 |		private[this] val shadowed3 = 3 + 3 // error
+-- Warning: tests/neg/i17612b/i17612b.scala:24:2 -----------------------------------------------------------------------
+24 |		private[this] val shadowed3 = 3 + 3 // warn
    |		^
    |		value shadowed3 in class Derived shadows field shadowed3 inherited from trait Base
--- Error: tests/neg/i17612b/i17612b.scala:26:2 -------------------------------------------------------------------------
-26 |		private val shadowed5 = 5 + 5 // error
+-- Warning: tests/neg/i17612b/i17612b.scala:26:2 -----------------------------------------------------------------------
+26 |		private val shadowed5 = 5 + 5 // warn
    |		^
    |		value shadowed5 in class Derived shadows field shadowed5 inherited from trait Base
--- Error: tests/neg/i17612b/i17612b.scala:41:20 ------------------------------------------------------------------------
-41 |	class UnderDerived(x: Int, y: Int, z: Int) extends Derived(x, 1, y, z) // error // error // error
+-- Warning: tests/neg/i17612b/i17612b.scala:41:20 ----------------------------------------------------------------------
+41 |	class UnderDerived(x: Int, y: Int, z: Int) extends Derived(x, 1, y, z) // warn // warn // warn
    |	                   ^
    |	                   value x in class UnderDerived shadows field x inherited from trait Base
--- Error: tests/neg/i17612b/i17612b.scala:41:28 ------------------------------------------------------------------------
-41 |	class UnderDerived(x: Int, y: Int, z: Int) extends Derived(x, 1, y, z) // error // error // error
+-- Warning: tests/neg/i17612b/i17612b.scala:41:28 ----------------------------------------------------------------------
+41 |	class UnderDerived(x: Int, y: Int, z: Int) extends Derived(x, 1, y, z) // warn // warn // warn
    |	                           ^
    |	                           value y in class UnderDerived shadows field y inherited from trait Base
--- Error: tests/neg/i17612b/i17612b.scala:41:36 ------------------------------------------------------------------------
-41 |	class UnderDerived(x: Int, y: Int, z: Int) extends Derived(x, 1, y, z) // error // error // error
+-- Warning: tests/neg/i17612b/i17612b.scala:41:36 ----------------------------------------------------------------------
+41 |	class UnderDerived(x: Int, y: Int, z: Int) extends Derived(x, 1, y, z) // warn // warn // warn
    |	                                   ^
    |	                                   value z in class UnderDerived shadows field z inherited from trait Base
+No warnings can be incurred under -Werror.