Reduce levels of go-off nesting

Adding a single `let` wrapping the test body results in
"ClassFormatError: Too many arguments in method signature in class file"

Author: KingMob

test/manifold/go_off_test.clj

@@ -57,7 +57,7 @@
 (deftest go-off-nests
   (testing "return deferred will always result in a a realizable value, not another deferred"
     (is (= [23 42] @(go-off (let [let* 1 a 23] (go-off (let* [b 42] [a b]))))))
-    (is (= 5 @(go-off (go-off (go-off (go-off (go-off (go-off (go-off 5))))))))))
+    (is (= 5 @(go-off (go-off (go-off (go-off (go-off 5))))))))
   (testing "Parking unwraps nested deferreds"
     (is (= 5 @(go-off (<!? (go-off (go-off (go-off 5)))))))))
 
@@ -173,4 +173,4 @@
   (bench "go-off deferred x5"
          @(go-off (inc (<!? (inc (<!? (inc (<!? (inc (<!? (inc (<!? (d/success-deferred 0))))))))))))
          (bench "go-off future 200 x5"
-                @(go-off (inc (<!? (inc (<!? (inc (<!? (inc (<!? (inc (<!? (d/future (Thread/sleep 200) 0)))))))))))))))
+                @(go-off (inc (<!? (inc (<!? (inc (<!? (inc (<!? (inc (<!? (d/future (Thread/sleep 200) 0)))))))))))))))