addressing comments

tests/strided_span_tests.cpp

@@ -25,18 +25,17 @@
 #if __clang__ || __GNUC__
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-
 //disable warnings from gtest
 #pragma GCC diagnostic ignored "-Wundef"
-#endif
+#endif // __clang__ || __GNUC__
+
 #if __clang__
 #pragma GCC diagnostic ignored "-Wglobal-constructors"
 #pragma GCC diagnostic ignored "-Wused-but-marked-unused"
 #pragma GCC diagnostic ignored "-Wcovered-switch-default"
-#endif
+#endif // __clang__
 
 #include <gtest/gtest.h>
-
 #include <gsl/gsl_byte>   // for byte
 #include <gsl/gsl_util>   // for narrow_cast
 #include <gsl/multi_span> // for strided_span, index, multi_span, strided_...
@@ -47,16 +46,14 @@
 #include <type_traits> // for integral_constant<>::value, is_convertible
 #include <vector>      // for vector
 
-namespace gsl {
-struct fail_fast;
-}  // namespace gsl
-
 using namespace std;
 using namespace gsl;
 
+
 namespace
 {
-static const char *deathstring("Expected Death");
+static constexpr char deathstring[] = "Expected Death";
+
 struct BaseClass
 {
 };
@@ -815,4 +812,4 @@ TEST(strided_span_tests, strided_span_conversion)
 
 #if __clang__ || __GNUC__
 #pragma GCC diagnostic pop
-#endif
+#endif // __clang__ || __GNUC__