* Handle missing EOL in todo.txt
This can happen easily with certain editors (such as Mousepad) that do not automatically add a newline character at the end of a file.
In _addto(), ensure a trailing newline via sed (taken from https://unix.stackexchange.com/a/31955/18876).
Fixes#294
* Tests: Add basic coverage of move
* Handle missing EOL in todo.txt for move, too
This can happen easily with certain editors (such as Mousepad) that do not automatically add a newline character at the end of a file.
* Refactoring: Extract fixMissingEndOfLine()
* FIX: Compatibility: sed \+ multi not supported on MacOS
Use the POSIX \{1,\} instead.
Co-authored-by: Ali Karbassi <ali@karbassi.com>
