[m-rev.] for review: improvements to the coverage testing tool

[Julien Fischer]

On Wed, 1 Apr 2015, Julien Fischer wrote:

>
> For review by anyone.
>
> ---------------------
>
> Improvements to mcov.
>
> slice/mcov.m:
> 	Do not include labels from the standard library in coverage reports 
> by
> 	default.  Add a new command line option that can be used to force 
> mcov
> 	to include these labels.
>
> 	XXX TODO: labels for opt_imported standard library procedures are 
> still
> 	showing up -- I will address this in a separate change.
>
> 	Change the usage message to use the same format that mmc and mprof
> 	use.
>
> 	Set the exit status to a non-zero value if an error occurs.
>
> 	Use io.format in more places.
>
> 	Replace calls to error/1 with unexpected/3.
>
> 	Add a new option, --flags-file, that allows options to be read
> 	from a file (as with the identically named mmc option).

In the absence of any review comments I intend to commit this later
today.

Cheers,
Julien.