message: Remove incomplete copy ctor
  When making a copy of Expression_lhs, m_assert_type would be garbage.
diff: @@ -1336,9 +1336,6 @@ namespace detail
  : lhs(in)
  , m_assert_type(assert_type) {}
  - Expression_lhs(const Expression_lhs& other)
  - : lhs(other.lhs) {}
  -
  DOCTEST_NOINLINE operator Result() {
  bool res = !!lhs;
  if(m_assert_type & assertType::is_false) //!OCLINT bitwise operator in conditional
  