diff --git a/map_machine/color.py b/map_machine/color.py
index 8eac388..862a010 100644
--- a/map_machine/color.py
+++ b/map_machine/color.py
@@ -1,6 +1,4 @@
-"""
-Color utility.
-"""
+"""Color utility."""
 from typing import Any
 
 from colour import Color
diff --git a/map_machine/constructor.py b/map_machine/constructor.py
index 76d7e98..ed5895e 100644
--- a/map_machine/constructor.py
+++ b/map_machine/constructor.py
@@ -1,6 +1,4 @@
-"""
-Construct Map Machine nodes and ways.
-"""
+"""Construct Map Machine nodes and ways."""
 import logging
 import sys
 from datetime import datetime
diff --git a/map_machine/doc/__init__.py b/map_machine/doc/__init__.py
index 12eaacc..0ed2dca 100644
--- a/map_machine/doc/__init__.py
+++ b/map_machine/doc/__init__.py
@@ -1,3 +1 @@
-"""
-Documentation utilities.
-"""
+"""Documentation utilities."""
diff --git a/map_machine/doc/doc_collections.py b/map_machine/doc/doc_collections.py
index 181a644..92ea15a 100644
--- a/map_machine/doc/doc_collections.py
+++ b/map_machine/doc/doc_collections.py
@@ -1,6 +1,4 @@
-"""
-Special icon collections for documentation.
-"""
+"""Special icon collections for documentation."""
 import json
 from dataclasses import dataclass, field
 from pathlib import Path
diff --git a/map_machine/doc/draw_elements.py b/map_machine/doc/draw_elements.py
index ab885e0..5dbf678 100644
--- a/map_machine/doc/draw_elements.py
+++ b/map_machine/doc/draw_elements.py
@@ -1,6 +1,4 @@
-"""
-Draw test nodes, ways, and relations.
-"""
+"""Draw test nodes, ways, and relations."""
 import logging
 from pathlib import Path
 from typing import Optional
diff --git a/map_machine/doc/icons.py b/map_machine/doc/icons.py
index 376059b..b4ef2d9 100644
--- a/map_machine/doc/icons.py
+++ b/map_machine/doc/icons.py
@@ -1,6 +1,4 @@
-"""
-Icon grids for documentation.
-"""
+"""Icon grids for documentation."""
 from pathlib import Path
 from typing import Iterable
 
diff --git a/map_machine/doc/moire_manager.py b/map_machine/doc/moire_manager.py
index 7a01dfd..060da7c 100644
--- a/map_machine/doc/moire_manager.py
+++ b/map_machine/doc/moire_manager.py
@@ -1,6 +1,4 @@
-"""
-Moire markup extension for Map Machine.
-"""
+"""Moire markup extension for Map Machine."""
 import argparse
 from abc import ABC
 from pathlib import Path
diff --git a/map_machine/doc/preview.py b/map_machine/doc/preview.py
index 1cb7035..c4e19e3 100755
--- a/map_machine/doc/preview.py
+++ b/map_machine/doc/preview.py
@@ -1,6 +1,4 @@
-"""
-Actions to perform before commit: generate PNG images for documentation.
-"""
+"""Actions to perform before commit: generate PNG images for documentation."""
 import logging
 import sys
 from pathlib import Path
diff --git a/map_machine/doc/wiki.py b/map_machine/doc/wiki.py
index 516b432..32da8c2 100644
--- a/map_machine/doc/wiki.py
+++ b/map_machine/doc/wiki.py
@@ -1,6 +1,4 @@
-"""
-Automate OpenStreetMap wiki editing.
-"""
+"""Automate OpenStreetMap wiki editing."""
 import re
 from pathlib import Path
 from typing import Optional
diff --git a/map_machine/drawing.py b/map_machine/drawing.py
index b83708b..e65277d 100644
--- a/map_machine/drawing.py
+++ b/map_machine/drawing.py
@@ -1,6 +1,4 @@
-"""
-Drawing utility.
-"""
+"""Drawing utility."""
 from dataclasses import dataclass
 from pathlib import Path
 from typing import Optional, Union
diff --git a/map_machine/element/single.py b/map_machine/element/single.py
index b82a04d..82a50e0 100644
--- a/map_machine/element/single.py
+++ b/map_machine/element/single.py
@@ -1,6 +1,4 @@
-"""
-Drawing separate map elements.
-"""
+"""Drawing separate map elements."""
 import argparse
 import logging
 from pathlib import Path
diff --git a/map_machine/feature/building.py b/map_machine/feature/building.py
index 5e97b56..104b533 100644
--- a/map_machine/feature/building.py
+++ b/map_machine/feature/building.py
@@ -1,6 +1,4 @@
-"""
-Buildings on the map.
-"""
+"""Buildings on the map."""
 import numpy as np
 from colour import Color
 from svgwrite import Drawing
diff --git a/map_machine/feature/crater.py b/map_machine/feature/crater.py
index 29885fd..35fe3a4 100644
--- a/map_machine/feature/crater.py
+++ b/map_machine/feature/crater.py
@@ -1,6 +1,4 @@
-"""
-Crater on the map.
-"""
+"""Crater on the map."""
 import numpy as np
 from colour import Color
 from svgwrite import Drawing
diff --git a/map_machine/feature/direction.py b/map_machine/feature/direction.py
index b86d935..d3b69f8 100644
--- a/map_machine/feature/direction.py
+++ b/map_machine/feature/direction.py
@@ -1,6 +1,4 @@
-"""
-Direction tag support.
-"""
+"""Direction tag support."""
 from typing import Iterator, Optional
 
 import numpy as np
diff --git a/map_machine/feature/road.py b/map_machine/feature/road.py
index b4770d6..65e424a 100644
--- a/map_machine/feature/road.py
+++ b/map_machine/feature/road.py
@@ -1,6 +1,4 @@
-"""
-WIP: road shape drawing.
-"""
+"""WIP: road shape drawing."""
 import logging
 from collections import defaultdict
 from dataclasses import dataclass
diff --git a/map_machine/figure.py b/map_machine/figure.py
index 1f5d4c4..654b48a 100644
--- a/map_machine/figure.py
+++ b/map_machine/figure.py
@@ -1,6 +1,4 @@
-"""
-Figures displayed on the map.
-"""
+"""Figures displayed on the map."""
 import numpy as np
 
 from map_machine.geometry.flinger import Flinger
diff --git a/map_machine/geometry/boundary_box.py b/map_machine/geometry/boundary_box.py
index e35706d..9dc0411 100644
--- a/map_machine/geometry/boundary_box.py
+++ b/map_machine/geometry/boundary_box.py
@@ -1,6 +1,4 @@
-"""
-Rectangle that limit space on the map.
-"""
+"""Rectangle that limit space on the map."""
 import logging
 import re
 from dataclasses import dataclass
diff --git a/map_machine/geometry/flinger.py b/map_machine/geometry/flinger.py
index 5f0065c..a7f6f4b 100644
--- a/map_machine/geometry/flinger.py
+++ b/map_machine/geometry/flinger.py
@@ -1,6 +1,4 @@
-"""
-Geo projection.
-"""
+"""Geo projection."""
 from typing import Optional
 
 import numpy as np
diff --git a/map_machine/geometry/vector.py b/map_machine/geometry/vector.py
index c583479..c6a79f3 100644
--- a/map_machine/geometry/vector.py
+++ b/map_machine/geometry/vector.py
@@ -1,6 +1,4 @@
-"""
-Vector utility.
-"""
+"""Vector utility."""
 import numpy as np
 
 __author__ = "Sergey Vartanov"
diff --git a/map_machine/main.py b/map_machine/main.py
index af769c2..b003443 100644
--- a/map_machine/main.py
+++ b/map_machine/main.py
@@ -1,6 +1,4 @@
-"""
-Map Machine entry point.
-"""
+"""Map Machine entry point."""
 import argparse
 import logging
 import sys
diff --git a/map_machine/map_configuration.py b/map_machine/map_configuration.py
index 9161391..0b4b272 100644
--- a/map_machine/map_configuration.py
+++ b/map_machine/map_configuration.py
@@ -1,6 +1,4 @@
-"""
-Map drawing configuration.
-"""
+"""Map drawing configuration."""
 import argparse
 from dataclasses import dataclass
 from enum import Enum
diff --git a/map_machine/mapcss.py b/map_machine/mapcss.py
index 35d3cc3..75c9981 100644
--- a/map_machine/mapcss.py
+++ b/map_machine/mapcss.py
@@ -1,6 +1,4 @@
-"""
-MapCSS scheme creation.
-"""
+"""MapCSS scheme creation."""
 import argparse
 import logging
 from pathlib import Path
diff --git a/map_machine/mapper.py b/map_machine/mapper.py
index 970db86..288716b 100644
--- a/map_machine/mapper.py
+++ b/map_machine/mapper.py
@@ -1,6 +1,4 @@
-"""
-Simple OpenStreetMap renderer.
-"""
+"""Simple OpenStreetMap renderer."""
 import argparse
 import logging
 import sys
diff --git a/map_machine/osm/osm_getter.py b/map_machine/osm/osm_getter.py
index e47f875..86e5192 100644
--- a/map_machine/osm/osm_getter.py
+++ b/map_machine/osm/osm_getter.py
@@ -1,6 +1,4 @@
-"""
-Getting OpenStreetMap data from the web.
-"""
+"""Getting OpenStreetMap data from the web."""
 import logging
 import time
 from dataclasses import dataclass
diff --git a/map_machine/osm/osm_reader.py b/map_machine/osm/osm_reader.py
index af06ae4..f6beea9 100644
--- a/map_machine/osm/osm_reader.py
+++ b/map_machine/osm/osm_reader.py
@@ -1,6 +1,4 @@
-"""
-Parse OSM XML file.
-"""
+"""Parse OSM XML file."""
 import json
 import logging
 import re
diff --git a/map_machine/pictogram/__init__.py b/map_machine/pictogram/__init__.py
index a667ec5..ec2b26b 100644
--- a/map_machine/pictogram/__init__.py
+++ b/map_machine/pictogram/__init__.py
@@ -1,3 +1 @@
-"""
-Icons and points.
-"""
+"""Icons and points."""
diff --git a/map_machine/pictogram/icon.py b/map_machine/pictogram/icon.py
index 7810d07..b294d97 100644
--- a/map_machine/pictogram/icon.py
+++ b/map_machine/pictogram/icon.py
@@ -1,6 +1,4 @@
-"""
-Extract icons from SVG file.
-"""
+"""Extract icons from SVG file."""
 import json
 import logging
 import re
diff --git a/map_machine/pictogram/icon_collection.py b/map_machine/pictogram/icon_collection.py
index 1b4b8db..b3085b3 100644
--- a/map_machine/pictogram/icon_collection.py
+++ b/map_machine/pictogram/icon_collection.py
@@ -1,6 +1,4 @@
-"""
-Icon grid drawing.
-"""
+"""Icon grid drawing."""
 import logging
 import shutil
 from dataclasses import dataclass
diff --git a/map_machine/pictogram/point.py b/map_machine/pictogram/point.py
index 0704736..b4ca20c 100644
--- a/map_machine/pictogram/point.py
+++ b/map_machine/pictogram/point.py
@@ -1,6 +1,4 @@
-"""
-Point: node representation on the map.
-"""
+"""Point: node representation on the map."""
 import logging
 from typing import Optional
 
diff --git a/map_machine/scheme.py b/map_machine/scheme.py
index ce3b442..34b1da6 100644
--- a/map_machine/scheme.py
+++ b/map_machine/scheme.py
@@ -1,6 +1,4 @@
-"""
-Map Machine drawing scheme.
-"""
+"""Map Machine drawing scheme."""
 import logging
 import re
 from dataclasses import dataclass
diff --git a/map_machine/slippy/server.py b/map_machine/slippy/server.py
index 7cab8bb..6f245ce 100644
--- a/map_machine/slippy/server.py
+++ b/map_machine/slippy/server.py
@@ -1,6 +1,4 @@
-"""
-Map Machine tile server for slippy maps.
-"""
+"""Map Machine tile server for slippy maps."""
 import argparse
 import logging
 from http.server import HTTPServer, SimpleHTTPRequestHandler
diff --git a/map_machine/text.py b/map_machine/text.py
index 6d4b71c..d79534c 100644
--- a/map_machine/text.py
+++ b/map_machine/text.py
@@ -1,6 +1,4 @@
-"""
-OSM address tag processing.
-"""
+"""OSM address tag processing."""
 from dataclasses import dataclass
 from typing import Any, Optional
 
diff --git a/map_machine/ui/cli.py b/map_machine/ui/cli.py
index efb8319..f632473 100644
--- a/map_machine/ui/cli.py
+++ b/map_machine/ui/cli.py
@@ -1,6 +1,4 @@
-"""
-Command-line user interface.
-"""
+"""Command-line user interface."""
 import argparse
 
 from map_machine import __version__
diff --git a/map_machine/util.py b/map_machine/util.py
index e92efd7..774747d 100644
--- a/map_machine/util.py
+++ b/map_machine/util.py
@@ -1,6 +1,4 @@
-"""
-Utility file.
-"""
+"""Utility file."""
 from dataclasses import dataclass
 from typing import Any
 
diff --git a/map_machine/workspace.py b/map_machine/workspace.py
index d76d337..d7bfa24 100644
--- a/map_machine/workspace.py
+++ b/map_machine/workspace.py
@@ -1,6 +1,4 @@
-"""
-File and directory path in the project.
-"""
+"""File and directory path in the project."""
 from pathlib import Path
 
 __author__ = "Sergey Vartanov"