[flake8-comprehensions] bugfix for C413 autofix (#2804)

docs/rules/unnecessary-call-around-sorted.md

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+# unnecessary-call-around-sorted (C413)
+
+Derived from the **flake8-comprehensions** linter.
+
+Autofix is always available.
+
+## What it does
+Checks for unnecessary `list` or `reversed` calls around `sorted`
+calls.
+
+## Why is this bad?
+It is unnecessary to use `list` around `sorted`, as the latter already
+returns a list.
+
+It is also unnecessary to use `reversed` around `sorted`, as the latter
+has a `reverse` argument that can be used in lieu of an additional
+`reversed` call.
+
+In both cases, it's clearer to avoid the redundant call.
+
+## Examples
+```python
+reversed(sorted(iterable))
+```
+
+Use instead:
+```python
+sorted(iterable, reverse=True)
+```