Fix gcc braces warning. NFCI.

gcc warns that the EXPECT_TRUE macro isn't surrounded by if() {} - we already do this in other cases in the file.

Author: RKSimon

llvm/unittests/IR/ConstantRangeTest.cpp

@@ -152,8 +152,9 @@ static void TestUnsignedBinOpExhaustive(Fn1 RangeFn, Fn2 IntFn,
         }
 
         EXPECT_TRUE(CR.contains(Exact));
-        if (Exact.isEmptySet())
+        if (Exact.isEmptySet()) {
           EXPECT_TRUE(CR.isEmptySet());
+        }
       });
 }