PEP 636: Fix typo: being --> been (#2101)

raulcd · web-flow · commit 93773a47eac9 · 2021-10-05T21:50:39.000+11:00
diff --git a/pep-0636.rst b/pep-0636.rst
@@ -187,7 +187,7 @@ Composing patterns
 
 This is a good moment to step back from the examples and understand how the patterns
 that you have been using are built. Patterns can be nested within each other, and we
-have being doing that implicitly in the examples above.
+have been doing that implicitly in the examples above.
 
 There are some "simple" patterns ("simple" here meaning that they do not contain other
 patterns) that we've seen:
