support calculate function coverage rate

[xiaoyun94]

It will display as format

int getX(int x) 1x [100.0%]
if ( x > 0) { 1x
    return 1; 1x
}
return 0; 1x

Signed-off-by: FANG.Ge [email protected]

[GitMensch]

@xiaoyun94 Is there any chance for you to work on the requested changes?

[GitMensch]

@JacquesLucke Isn't that feature included in version 0.5.0 (the one still missing on open-vsx ;-) ? In this case the issue could be closed.