Select source lines

Add the option to include a from and to line so that only those lines are covered. This will be useful if the number of lines of source code exceeds the limit imposed by the compiler

No files or tests are named. Start by locating the code-coverage option and the entry point that selects source lines, then inspect how the compiler line limit is handled. Done means callers can provide from and to lines and coverage is restricted to that range.

Written by the indexing model from the issue text.