Add info filter

[ok-nick]

I'm currently using insta_cmd where my command takes an absolute path as an argument. The problem is that when snapshots are taken, the info includes my username and other specific path info:

---
source: tests/test_view.rs
info:
  program: my_program
  args:
    - info
    - /Users/my_username/Documents/my_image.jpg
---

I'd like to avoid exposing my username and local filesystem structure and keep the info more general. For now I'll hide all of the info, but it'd be better if it can be filtered. This issue is applicable to both insta and insta_cmd because of how it records the info.

Edit: It seems using Settings::set_raw_info or Settings::remove_info or Settings::remove_description doesn't actually hide the info, so I'm not sure if a workaround exists for this issue?

[mitsuhiko]

This is a known issue with insta-cmd at the moment. Right now I recommend to use inline snapshots which will omit this.