Merge pull request #11517 from dotty-staging/fix-11487

Fix source version in migration message

Author: liufengyun

compiler/src/dotty/tools/dotc/parsing/Parsers.scala

@@ -3119,7 +3119,7 @@ object Parsers {
       def wildcardSelector() =
         if in.token == USCORE && sourceVersion.isAtLeast(future) then
           report.errorOrMigrationWarning(
-            em"`_` is no longer supported for a wildcard import; use `*` instead${rewriteNotice("3.1")}",
+            em"`_` is no longer supported for a wildcard import; use `*` instead${rewriteNotice("future")}",
             in.sourcePos())
           patch(source, Span(in.offset, in.offset + 1), "*")
         ImportSelector(atSpan(in.skipToken()) { Ident(nme.WILDCARD) })
@@ -3137,7 +3137,7 @@ object Parsers {
         if in.token == ARROW || isIdent(nme.as) then
           if in.token == ARROW && sourceVersion.isAtLeast(future) then
             report.errorOrMigrationWarning(
-              em"The import renaming `a => b` is no longer supported ; use `a as b` instead${rewriteNotice("3.1")}",
+              em"The import renaming `a => b` is no longer supported ; use `a as b` instead${rewriteNotice("future")}",
               in.sourcePos())
             patch(source, Span(in.offset, in.offset + 2),
                 if testChar(in.offset - 1, ' ') && testChar(in.offset + 2, ' ') then "as"

tests/neg/i11487.check

@@ -0,0 +1,5 @@
+-- Error: tests/neg/i11487.scala:2:13 ----------------------------------------------------------------------------------
+2 |import scala._  // error
+  |             ^
+  |             `_` is no longer supported for a wildcard import; use `*` instead
+  |             This construct can be rewritten automatically under -rewrite -source future-migration.

tests/neg/i11487.scala

@@ -0,0 +1,4 @@
+import language.future
+import scala._  // error
+
+object Test