Update brace style.

Add braces around single-line blocks, and remove line breaks before
function-opening braces.

This resolves #537.

test/integration/cpp/basic.cpp

@@ -1,8 +1,7 @@
 #include <memory>
 #include "test/jemalloc_test.h"
 
-TEST_BEGIN(test_basic)
-{
+TEST_BEGIN(test_basic) {
 	auto foo = new long(4);
 	assert_ptr_not_null(foo, "Unexpected new[] failure");
 	delete foo;
@@ -20,8 +19,7 @@ TEST_BEGIN(test_basic)
 TEST_END
 
 int
-main()
-{
+main() {
 	return (test(
 	    test_basic));
 }