Update src/expressions/block-expr.md

Co-Authored-By: Eric Huss <eric@huss.org>

Author: nikomatsakis

src/expressions/block-expr.md

@@ -112,7 +112,7 @@ Async blocks capture variables from their environment using the same
 [capture modes] as closures. Like closures, when written `async {
 .. }` the capture mode for each variable will be inferred from the
 content of the block. `async move { .. }` blocks however will move all
-referenced variables are moved into the resulting future.
+referenced variables into the resulting future.
 
 [capture modes]: ../types/closure.md#capture-modes
 [shared references]: ../types/pointer.md#shared-references-