Update compiler/src/dotty/tools/dotc/core/TypeComparer.scala

Co-authored-by: Guillaume Martres <smarter@ubuntu.com>

Author: odersky

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

@@ -140,7 +140,7 @@ class TypeComparer(@constructorOnly initctx: Context) extends ConstraintHandling
     finally useNecessaryEither = saved
 
   /** Use avoidance to get rid of wildcards in constraint bounds if
-   *  we are doing a neccessary comparison, or the mode is TypeVarsMissContext.
+   *  we are doing a necessary comparison, or the mode is TypeVarsMissContext.
    *  The idea is that under either of these conditions we are not interested
    *  in creating a fresh type variable to replace the wildcard. I verified
    *  that several tests break if one or the other part of the disjunction is dropped.