Fix help flag

[sophiajt]

Description

This change brings help <command name> and <command name> --help to the same level. The two should now show identical help.

> grid --help
Renders the output to a textual terminal grid.

grid was built to give a concise gridded layout for ls. however,
it determines what to put in the grid by looking for a column named
'name'. this works great for tables and records but for lists we
need to do something different. such as with '[one two three] | grid'
it creates a fake column called 'name' for these values so that it
Usage:
  > grid {flags} 

      Display this help message
  -w, --width <Int>
      number of columns wide
  -c, --color
      draw output with color
  -s, --separator <String>
      character to separate grid with

cc @fdncred

Tests

Make sure you've run and fixed any issues with these commands:

• cargo fmt --all -- --check to check standard code formatting (cargo fmt --all applies these changes)
• cargo clippy --all --all-features -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect to check that you're using the standard code style
• cargo build; cargo test --all --all-features to check that all the tests pass