gh-37769: src/sage/modules/with_basis/representation.py: pycodestyl…

…e fix

    
<!-- ^ Please provide a concise and informative title. -->
<!-- ^ Don't put issue numbers in the title, do this in the PR
description below. -->
<!-- ^ For example, instead of "Fixes #12345" use "Introduce new method
to calculate 1 + 2". -->
<!-- v Describe your changes below in detail. -->
<!-- v Why is this change required? What problem does it solve? -->
<!-- v If this PR resolves an open issue, please link to it here. For
example, "Fixes #12345". -->

Fixes linter failure in 10.4.beta2

### 📝 Checklist

<!-- Put an `x` in all the boxes that apply. -->

- [x] The title is concise and informative.
- [ ] The description explains in detail what this PR is about.
- [ ] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation accordingly.

### ⌛ Dependencies

<!-- List all open PRs that this PR logically depends on. For example,
-->
<!-- - #12345: short description why this is a dependency -->
<!-- - #34567: ... -->
    
URL: #37769
Reported by: Matthias Köppe
Reviewer(s): Frédéric Chapoton

src/sage/modules/with_basis/representation.py

@@ -1421,7 +1421,6 @@ def _action_on_basis(self, g, b, vec_on_left):
         return self.element_class(self, data)
 
 
-
 class RegularRepresentation(Representation):
     r"""
     The regular representation of a semigroup.
@@ -1504,7 +1503,6 @@ def _right_on_basis(self, g, m):
         return self.monomial(m * g)
 
 
-
 class TrivialRepresentation(Representation_abstract):
     """
     The trivial representation of a semigroup.