test_slash_a_anchors_to_the_start_of_the_string passing
test_slash_z_anchors_to_the_end_of_the_string passing
test_caret_anchors_to_the_start_of_lines passing
test_dollar_sign_anchors_to_the_end_of_lines passing
test_slash_b_anchors_to_a_word_boundary passing