Merge pull request #9830 from bplommer/grammar

small English grammar fixes

Author: anatoliykmetyuk

compiler/src/dotty/tools/dotc/core/Symbols.scala

@@ -206,7 +206,7 @@ object Symbols {
     }
 
     /** Enter this symbol in its class owner after given `phase`. Create a fresh
-     *  denotation for its owner class if the class has not yet already one
+     *  denotation for its owner class if the class does not already have one
      *  that starts being valid after `phase`.
      *  @pre  Symbol is a class member
      */
@@ -232,7 +232,7 @@ object Symbols {
     }
 
     /** Remove symbol from scope of owning class after given `phase`. Create a fresh
-     *  denotation for its owner class if the class has not yet already one that starts being valid after `phase`.
+     *  denotation for its owner class if the class does not already have one that starts being valid after `phase`.
      *  @pre  Symbol is a class member
      */
     def dropAfter(phase: DenotTransformer)(using Context): Unit =