440 add split file example

[hiker]

Ready for review. I have used this script to divide a driver back into the original files, and found it very convenient, esp. the fact that it creates a Makefile with dependencies etc.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (5c3808d) 91.96% compared to head (5df7c68) 91.96%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #442 +/- ## ======================================= Coverage 91.96% 91.96% ======================================= Files 85 85 Lines 13644 13644 ======================================= Hits 12548 12548 Misses 1096 1096 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.96%. Comparing base (a9ea1e9) to head (5df7c68).

:exclamation: Current head 5df7c68 differs from pull request most recent head 55f166d. Consider uploading reports for the commit 55f166d to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #442 +/- ## ========================================== - Coverage 91.99% 91.96% -0.03% ========================================== Files 85 85 Lines 13678 13644 -34 ========================================== - Hits 12583 12548 -35 - Misses 1095 1096 +1 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.