Sometimes, due to rounding errors, after calculating the width of each
column in a table, the sum of all columns would be shorter that the
total available width in the terminal. This reimplements the elastic
column resizing algorithm to ensure that all available space has been
filled.
As a bonus fix, columns that contain URLs are never truncated.
- Fetching more than 100 gists is now supported
- The GraphQL query name is now `GistList` instead of `ListGists` for
consistency with other queries
- Avoid fetching unnecessary Files fields
- Gists are now rendered in the order that the API returned them in
- The gist timestamp for machine-readable output is now rendered in
RFC3339 format instead of in `time.Time.String()` format which is only
meant for debugging and is not considered stable
- Ensure newlines in gist description are rendered as spaces
It's not sufficient to use `Changed("public")` to test if a boolean flag
was activated, since the user might have passed `--public=false`.
Instead, check the true value of the flag.
The `--public` and `--secret` flags should be mutually exclusive, so now
if both are activated, `--secret` takes precedence.
