Added a workaround for C++20 ostream having deleted operator<< for wc…

…har_t.

Added a workaround for C++20 ostream having deleted operator<< for wc…

…har_t.

Added a workaround for C++20 ostream having deleted operator<< for wc…

…har_t.

Added a workaround for C++20 ostream having deleted operator<< for wc…

…har_t.

Disabled all but one OS X jobs because they are slow on Travis CI.

Disabled all but one OS X jobs because they are slow on Travis CI.

Disabled all but one OS X jobs because they are slow on Travis CI.

Disabled all but one OS X jobs because they are slow on Travis CI.

Fixed incorrect loop termination in lcm_range.

lcm_range used to incorrectly terminate on value of 1. Instead, it should
terminate on 0 since any further elements of the range no longer affect
the result of the function.

Also, added tests for the gcd_range and lcm_range functions verifying
that they terminate their loops at the correct points.

Fixed incorrect loop termination in lcm_range.

lcm_range used to incorrectly terminate on value of 1. Instead, it should
terminate on 0 since any further elements of the range no longer affect
the result of the function.

Also, added tests for the gcd_range and lcm_range functions verifying
that they terminate their loops at the correct points.