update docs diffpy.utils.tools

[sbillinge]

moved from #208

btw @alisnwu I closed this before reading https://www.diffpy.org/diffpy.utils/examples/toolsexample.html but there I saw no clear information about how to update the default user information. I would put it as an enumerated list to make it clearer. there are at least 4 different ways of setting these things with more or less permanence. Make it as an enumerated list. But also discuss with and example how to updage your default file using a text editor.

Also, is this a typo?

from diffpy.utils.tools import get_user_info
package_metadata = get_package_info("my_package")

Proposed solution

[bobleesj]

@alisnwu I heard from @yucongalicechen that finals are done today and you would have some bandwidth over the weekend.

Could you please take care of this issue and also a minor fix requested by @sbillinge in #207?

[alisnwu]

@bobleesj Yep! Will work on everything this weekend

[bobleesj]

Great!