[DATALAD RUNCMD] run codespell throughout fixing typos automagically

=== Do not change lines below ===
{
 "chain": [],
 "cmd": "codespell -w",
 "exit": 0,
 "extra_inputs": [],
 "inputs": [],
 "outputs": [],
 "pwd": "."
}
^^^ Do not change lines above ^^^

README.md

@@ -78,7 +78,7 @@ The primary contents are:
    `HTML` for constructing the form itself. This can contain multiple templates
    that are composed together using all of jinja2's composition features (like `include`)
 2. `src/` contains JS and CSS that are packaged via standard frontend bundling
-   tools (`webpack` and `babel`), outputing assets into `jupyterhub_fancy_profiles/static/`.
+   tools (`webpack` and `babel`), outputting assets into `jupyterhub_fancy_profiles/static/`.
    This allows us to use _standard_ frontend tooling to write JS & CSS - for
    example, [xterm.js](http://xtermjs.org/) can be used without many complications.