Fix rebase breakage

Author: odersky

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

@@ -3111,7 +3111,7 @@ object Parsers {
 
       /** ‘*' | ‘_' */
       def wildcardSelector() =
-        if in.token == USCORE && sourceVersion.isAtLeast(`3.1`) then
+        if in.token == USCORE && sourceVersion.isAtLeast(future) then
           report.errorOrMigrationWarning(
             em"`_` is no longer supported for a wildcard import; use `*` instead${rewriteNotice("3.1")}",
             in.sourcePos())
@@ -3129,7 +3129,7 @@ object Parsers {
       /** id [‘as’ (id | ‘_’) */
       def namedSelector(from: Ident) =
         if in.token == ARROW || isIdent(nme.as) then
-          if in.token == ARROW && sourceVersion.isAtLeast(`3.1`) then
+          if in.token == ARROW && sourceVersion.isAtLeast(future) then
             report.errorOrMigrationWarning(
               em"The import renaming `a => b` is no longer supported ; use `a as b` instead${rewriteNotice("3.1")}",
               in.sourcePos())