dot: fix typo

[mcbloch]

fix typing error

---

• The page has 8 or fewer examples.

• The PR is appropriately titled:
  <command name>: add page for new pages, or <command name>: <description of changes> for pages being edited.

• The page follows the contributing guidelines.

[CLAassistant]

All committers have signed the CLA.

[agnivade]

Many commands actually do not bother if there is no space after a flag. But anyways, it's good to be clear.

[sbrl]

Hey, thanks for the change @maximebloch! The lack of a space here was probably intentional. Does this command still work with a space? If so, I'd definitely advocate this change, as it makes the page clearer :-)

[mcbloch]

Thanks, I did not know that flags without spacing are a thing. I just checked and the command does work without and without the space.
Thanks for merging :)