chore: update formatter in CONTRIBUTING.rst (#178)

* chore: update formatter in CONTRIBUTING.rst

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* use owlbot to update the files

* remove for loop to format code samples, these are managed by the root noxfile.

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: tswast

CONTRIBUTING.md

@@ -96,9 +96,9 @@ On Debian/Ubuntu::
 Coding Style
 ************
 - We use the automatic code formatter ``black``. You can run it using
-  the nox session ``blacken``. This will eliminate many lint errors. Run via::
+  the nox session ``format``. This will eliminate many lint errors. Run via::
 
-   $ nox -s blacken
+   $ nox -s format
 
 - PEP8 compliance is required, with exceptions defined in the linter configuration.
   If you have ``nox`` installed, you can test that you have not introduced

CONTRIBUTING.rst

@@ -99,6 +99,13 @@
     "BigQuery DataFrames provides DataFrame APIs on the BigQuery engine",
 )
 
+# Update the contributing guide to reflect some differences in this repo.
+s.replace(
+    ["CONTRIBUTING.rst"],
+    re.escape("blacken"),
+    "format",
+)
+
 # ----------------------------------------------------------------------------
 # Samples templates
 # ----------------------------------------------------------------------------
@@ -110,5 +117,3 @@
 # ----------------------------------------------------------------------------
 
 s.shell.run(["nox", "-s", "format"], hide_output=False)
-for noxfile in REPO_ROOT.glob("samples/**/noxfile.py"):
-    s.shell.run(["nox", "-s", "blacken"], cwd=noxfile.parent, hide_output=False)