Revert "remove corner case that didn't make it for 3.7.0"

This reverts commit eab0570.

Author: bjaglin

scalafix-tests/input/src/main/scala-3next/test/explicitResultTypes/ExplicitResultTypesBase.scala

@@ -26,6 +26,7 @@ object ExplicitResultTypesBase {
   object ExtraSpace {
     def * = "abc".length
     def ! = "abc".length
+    def foo_ = "abc".length
     def `x` = "abc".length
     def `x ` = "abc".length
   }

scalafix-tests/output/src/main/scala-3/test/explicitResultTypes/ExplicitResultTypesBase.scala

@@ -23,6 +23,7 @@ object ExplicitResultTypesBase {
   object ExtraSpace {
     def * : Int = "abc".length
     def ! : Int = "abc".length
+    def foo_ : Int = "abc".length
     def `x`: Int = "abc".length
     def `x `: Int = "abc".length
   }