Add file arguement to print function

[gowerc]

Closes #135

[github-actions]

Code Coverage Summary

Filename                Stmts    Miss  Cover    Missing
--------------------  -------  ------  -------  -----------------
R/ascii_tables.R          117       4  96.58%   10, 153, 164, 240
R/cast_variables.R         49       0  100.00%
R/diffdf.R                193       1  99.48%   400
R/generate_keyname.R       12       0  100.00%
R/identify.R              152       8  94.74%   283-290
R/is_different.R           52       0  100.00%
R/issuerows.R              40       0  100.00%
R/issues.R                 17       1  94.12%   52
R/misc_functions.R         34       2  94.12%   9, 13
R/print.R                  38       4  89.47%   54-55, 58-59
TOTAL                     704      20  97.16%

Results for commit: 1a4659e

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results

[github-actions]

Unit Tests Summary

  1 files   13 suites   7s ⏱️
 59 tests  55 ✅  4 💤 0 ❌
595 runs  584 ✅ 11 💤 0 ❌

Results for commit 1a4659e.

♻️ This comment has been updated with latest results.

[kieranjmartin]

Minor coding change suggested in testing

[dwoollacott]

Thanks @gowerc & @kieranjmartin - do you have a planned release date for the change?