diff --git a/Snakefile b/Snakefile
index 4d9c9a97..fe8cc465 100644
--- a/Snakefile
+++ b/Snakefile
@@ -94,6 +94,6 @@ rule doc:
     message:
         "Build documentation."
     output:
-        directory("doc/_build")
+        directory("doc/_build"),
     shell:
         "make -C doc html"
diff --git a/doc/plotting.rst b/doc/plotting.rst
index f734b150..895eab3b 100644
--- a/doc/plotting.rst
+++ b/doc/plotting.rst
@@ -26,4 +26,3 @@ Rule ``plot_network``
 ========================
 
 .. automodule:: plot_network
-
diff --git a/doc/preparation.rst b/doc/preparation.rst
index 54897868..a4a135a0 100644
--- a/doc/preparation.rst
+++ b/doc/preparation.rst
@@ -123,4 +123,4 @@ Rule ``build_hydro_profile``
 Rule ``add_electricity``
 =============================
 
-.. automodule:: add_electricity
\ No newline at end of file
+.. automodule:: add_electricity
diff --git a/doc/sector.rst b/doc/sector.rst
index 5cc19063..fd6b9cf0 100644
--- a/doc/sector.rst
+++ b/doc/sector.rst
@@ -161,9 +161,3 @@ Rule ``prepare_sector_network``
 ==============================================================================
 
 .. automodule:: prepare_sector_network
-
-
-
-
-
-
diff --git a/doc/solving.rst b/doc/solving.rst
index bd38972b..1b7ab07b 100644
--- a/doc/solving.rst
+++ b/doc/solving.rst
@@ -26,4 +26,4 @@ Rule ``solve_operations_network``
 Rule ``solve_sector_network``
 =============================
 
-.. automodule:: solve_sector_network
\ No newline at end of file
+.. automodule:: solve_sector_network
diff --git a/scripts/build_retro_cost.py b/scripts/build_retro_cost.py
index c9ea0947..037139d1 100644
--- a/scripts/build_retro_cost.py
+++ b/scripts/build_retro_cost.py
@@ -66,7 +66,6 @@ The script has the following structure:
     (3) calculate costs for corresponding additional insulation material
     (4) get cost savings per retrofitting measures for each sector by weighting
         with heated floor area
-
 """
 import pandas as pd
 import xarray as xr
diff --git a/scripts/build_shapes.py b/scripts/build_shapes.py
index 699b9818..93ff0523 100644
--- a/scripts/build_shapes.py
+++ b/scripts/build_shapes.py
@@ -4,8 +4,9 @@
 # SPDX-License-Identifier: MIT
 
 """
-Creates GIS shape files of the countries, exclusive economic zones and
-`NUTS3 <https://en.wikipedia.org/wiki/Nomenclature_of_Territorial_Units_for_Statistics>`_ areas.
+Creates GIS shape files of the countries, exclusive economic zones and `NUTS3 <
+https://en.wikipedia.org/wiki/Nomenclature_of_Territorial_Units_for_Statistics>
+`_ areas.
 
 Relevant Settings
 -----------------