Restore missing T (#589)

Author: RexJaeschke

standard/statements.md

@@ -858,7 +858,7 @@ The compile-time processing of a `foreach` statement first determines the ***col
   - Overload resolution is performed on the method group with an empty argument list. If overload resolution results in no applicable methods, results in an ambiguity, or results in a single best method but that method is either static or not public, or its return type is not `bool`, an error is produced and no further steps are taken.
   - The collection type is `X`, the enumerator type is `E`, and the iteration type is the type of the `Current` property.
 - Otherwise, check for an enumerable interface:
-  - If among all the types `Tᵢ` for which there is an implicit conversion from `X` to `IEnumerable<ᵢ>`, there is a unique type `T` such that `T` is not dynamic and for all the other `Tᵢ` there is an implicit conversion from `IEnumerable<T>` to `IEnumerable<Tᵢ>`, then the collection type is the interface `IEnumerable<T>`, the enumerator type is the interface `IEnumerator<T>`, and the iteration type is `T`.
+  - If among all the types `Tᵢ` for which there is an implicit conversion from `X` to `IEnumerable<Tᵢ>`, there is a unique type `T` such that `T` is not `dynamic` and for all the other `Tᵢ` there is an implicit conversion from `IEnumerable<T>` to `IEnumerable<Tᵢ>`, then the collection type is the interface `IEnumerable<T>`, the enumerator type is the interface `IEnumerator<T>`, and the iteration type is `T`.
   - Otherwise, if there is more than one such type `T`, then an error is produced and no further steps are taken.
   - Otherwise, if there is an implicit conversion from `X` to the `System.Collections.IEnumerable` interface, then the collection type is this interface, the enumerator type is the interface `System.Collections.IEnumerator`, and the iteration type is `object`.
   - Otherwise, an error is produced and no further steps are taken.