Style consistency in new code.

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/SelectMany.cs

@@ -55,7 +55,7 @@ namespace System.Linq
 
             async IAsyncEnumerator<TResult> Core(CancellationToken cancellationToken)
             {
-                int index = -1;
+                var index = -1;
 
                 await foreach (var element in AsyncEnumerableExtensions.WithCancellation(source, cancellationToken).ConfigureAwait(false))
                 {
@@ -89,7 +89,7 @@ namespace System.Linq
 
             async IAsyncEnumerator<TResult> Core(CancellationToken cancellationToken)
             {
-                int index = -1;
+                var index = -1;
 
                 await foreach (var element in AsyncEnumerableExtensions.WithCancellation(source, cancellationToken).ConfigureAwait(false))
                 {
@@ -124,7 +124,7 @@ namespace System.Linq
 
             async IAsyncEnumerator<TResult> Core(CancellationToken cancellationToken)
             {
-                int index = -1;
+                var index = -1;
 
                 await foreach (var element in AsyncEnumerableExtensions.WithCancellation(source, cancellationToken).ConfigureAwait(false))
                 {
@@ -250,7 +250,7 @@ namespace System.Linq
 
             async IAsyncEnumerator<TResult> Core(CancellationToken cancellationToken)
             {
-                int index = -1;
+                var index = -1;
 
                 await foreach (var element in AsyncEnumerableExtensions.WithCancellation(source, cancellationToken).ConfigureAwait(false))
                 {
@@ -286,7 +286,7 @@ namespace System.Linq
 
             async IAsyncEnumerator<TResult> Core(CancellationToken cancellationToken)
             {
-                int index = -1;
+                var index = -1;
 
                 await foreach (var element in AsyncEnumerableExtensions.WithCancellation(source, cancellationToken).ConfigureAwait(false))
                 {
@@ -323,7 +323,7 @@ namespace System.Linq
 
             async IAsyncEnumerator<TResult> Core(CancellationToken cancellationToken)
             {
-                int index = -1;
+                var index = -1;
 
                 await foreach (var element in AsyncEnumerableExtensions.WithCancellation(source, cancellationToken).ConfigureAwait(false))
                 {