`gren make --help` shows incorrect example

[gilramir]

It shows gren make src/Main.gren in:

 % gren make --help
The `make` command compiles Gren code into JS or HTML:

    gren make module-names

For example:

    gren make src/Main.gren

but that's incorrect. If you try it, it fails:

 % gren make src/Main.gren
I'm having trouble with this argument:

    src/Main.gren

It's supposed to be a <module-names> value, like one of these:

    Main
    My.Module

[robinheghan]

Fixed in compiler's main branch