[Enhancement] Outsource cffreference Logic

[kevinmatthes]

No description provided.

[github-actions]

Filename                        Stmts    Miss  Cover    Missing
----------------------------  -------  ------  -------  ---------------------------------------------------------------------------------------------
src/application.rs                 59      59  0.00%    156-242
src/cffreference.rs                53      53  0.00%    38-119
src/comment_changes.rs            133      60  54.89%   65-66, 91-92, 94, 98, 139-140, 171-172, 205-206, 213, 228-232, 237-249, 259-302, 315, 332-376
src/macros.rs                       4       0  100.00%
src/running.rs                      4       0  100.00%
src/version.rs                     26       0  100.00%
src/graphing/agd.rs               156       0  100.00%
src/graphing/graph.rs             146       0  100.00%
src/pattern/buffer.rs              21       0  100.00%
src/pattern/io_processor.rs        19      19  0.00%    72-160
src/pattern/reader.rs              29      20  31.03%   57-58, 75-79, 90-130
src/pattern/writer.rs              77      57  25.97%   118-197, 231-259
src/traits/append_as_line.rs        9       0  100.00%
src/traits/colour_message.rs        8       0  100.00%
src/traits/convert_buffer.rs       21       0  100.00%
src/traits/prefer.rs                3       0  100.00%
src/traits/to_stderr.rs             4       0  100.00%
TOTAL                             772     268  65.28%