diff --git a/data/dictionary.xml b/data/dictionary.xml
index f5b4b0b..37ec1a1 100644
--- a/data/dictionary.xml
+++ b/data/dictionary.xml
@@ -47,6 +47,7 @@
       <w>temaki</w>
       <w>tileset</w>
       <w>vartanov</w>
+      <w>wikitable</w>
     </words>
   </dictionary>
 </component>
diff --git a/map_machine/doc/moire_manager.py b/map_machine/doc/moire_manager.py
index 3363828..3728b54 100644
--- a/map_machine/doc/moire_manager.py
+++ b/map_machine/doc/moire_manager.py
@@ -58,10 +58,7 @@ class ArgumentParser(argparse.ArgumentParser):
         self.arguments.append(argument)
 
     def get_moire_help(self) -> Tag:
-        """
-        Return Moire table with "Option" and "Description" columns filled with
-        arguments.
-        """
+        """Return Moire table with "Option" and "Description" columns."""
         table: Code = [[["Option"], ["Description"]]]
 
         for option in self.arguments:
diff --git a/map_machine/doc/wiki.py b/map_machine/doc/wiki.py
index 210c373..b15cf39 100644
--- a/map_machine/doc/wiki.py
+++ b/map_machine/doc/wiki.py
@@ -29,7 +29,11 @@ ROENTGEN_HEADER_PATTERN: re.Pattern = re.compile("===.*Röntgen.*===")
 
 
 class WikiTable:
-    """SVG table with icon combinations."""
+    """
+    Trivial wiki table constructor.
+
+    Creates table with icon combinations.
+    """
 
     def __init__(self, collection: Collection, page_name: str):
         self.collection: Collection = collection
diff --git a/map_machine/element/grid.py b/map_machine/element/grid.py
index e0a71b4..f78f723 100644
--- a/map_machine/element/grid.py
+++ b/map_machine/element/grid.py
@@ -109,14 +109,13 @@ class Grid:
         map_.draw(constructor)
 
         for text, i, j in self.texts:
-            svg.add(
-                Text(
-                    text,
-                    flinger.fling((i, j)) + (0, 3),
-                    font_family="JetBrains Mono",
-                    font_size=12,
-                )
+            text_element: Text = Text(
+                text,
+                flinger.fling((i, j)) + np.array((0, 3)),
+                font_family="JetBrains Mono",
+                font_size=12,
             )
+            svg.add(text_element)
 
         with output_path.open("w") as output_file:
             svg.write(output_file)
diff --git a/map_machine/map_configuration.py b/map_machine/map_configuration.py
index e49f08b..54b61ce 100644
--- a/map_machine/map_configuration.py
+++ b/map_machine/map_configuration.py
@@ -12,6 +12,8 @@ from map_machine.scheme import Scheme
 __author__ = "Sergey Vartanov"
 __email__ = "me@enzet.ru"
 
+DARK_BACKGROUND: Color = Color("#111111")
+
 
 class DrawingMode(Enum):
     """Map drawing mode."""
@@ -91,7 +93,7 @@ class MapConfiguration:
     def background_color(self) -> Optional[Color]:
         """Get background map color based on drawing mode."""
         if self.drawing_mode not in (DrawingMode.NORMAL, DrawingMode.BLACK):
-            return Color("#111111")
+            return DARK_BACKGROUND
         return None
 
     def get_icon(
diff --git a/map_machine/mapper.py b/map_machine/mapper.py
index 34bb86c..a16f45b 100644
--- a/map_machine/mapper.py
+++ b/map_machine/mapper.py
@@ -34,7 +34,7 @@ __author__ = "Sergey Vartanov"
 __email__ = "me@enzet.ru"
 
 ROAD_PRIORITY: float = 40.0
-DEFAULT_SIZE = (800.0, 600.0)
+DEFAULT_SIZE: tuple[float, float] = (800.0, 600.0)
 
 
 class Map: