[fidldev] Print help text when no args provided

I thought the command was broken because I was getting a python error
when I called it with no arguments. I would instead expect the help
text (added by this CL).

Change-Id: I8e168bdf35c86c002c9118fe33f3d251416e5234
Reviewed-on: https://fuchsia-review.googlesource.com/c/fidl-misc/+/413909
Reviewed-by: Felix Zhu <fcz@google.com>
1 file changed
tree: 46625630020c1f319447eb1b53740541c19c5b09
  1. fidl-lsp/
  2. fidldev/
  3. vscode-language-fidl/
  4. .gitignore
  5. .vscodeignore
  6. AUTHORS
  7. CONTRIBUTING.md
  8. LICENSE
  9. PATENTS
  10. README.md
README.md

Fuchsia Open Source Template Repository

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