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clap/examples/02_apps.md
Ed Page bfa02fd418 test: More thoroughly test examples 
This ports our example testing over to [trycmd](https://docs.rs/) so
we can:
- More thoroughly test our examples
- Provide always-up-to-date example usage

The old way of testing automatically picked up examples.  This new way
requires we have a `.md` file that uses the example in some way.

Notes:
- Moved overall example description to the `.md` file
- I added cross-linking between related examples
- `14_groups` had a redundant paragraph (twice talked about "one and
  only one"
2021-11-23 13:13:41 -06:00

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Apps describe the top level application

You can see this in the help:

$ 02_apps --help
MyApp 1.0

Kevin K. <kbknapp@gmail.com>

Does awesome things

USAGE:
    02_apps[EXE]

OPTIONS:
    -h, --help       Print help information
    -V, --version    Print version information

And among the version

$ 02_apps --version
MyApp 1.0