composer install explanation not quite correct

[orottier]

The explanation is only correct when no lockfile is present, which should only happen in the first run of composer. Subsequent runs ignore the json file.

https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies

[orottier]

Thanks for adding a bit more info, but I think it's still incorrect. Maybe try something like
composer install: downloads and installs the dependencies as specified in the composer.lock file. If this file is not present, it falls back to composer update

[roelti]

Hi! I made a Pull request for this issue: #28