Fix some minor errors in the docstrings

src/textual/containers.py

@@ -95,7 +95,7 @@ def __init__(
             disabled: Whether the widget is disabled or not.
             can_focus: Can this container be focused?
             can_focus_children: Can this container's children be focused?
-            can_maximized: Allow this container to maximize? `None` to use default logic.,
+            can_maximize: Allow this container to maximize? `None` to use default logic.,
         """
 
         super().__init__(

src/textual/content.py

@@ -433,8 +433,9 @@ def assemble(
             ```
 
         Args:
-            *parts: Parts to join to gether. A *part* may be a simple string, another Content
-            instance, or tuple containing text and a style.
+            *parts: Parts to join to gether.
+                A *part* may be a simple string, another Content
+                instance, or tuple containing text and a style.
             end: Optional end to the Content.
             strip_control_codes: Strip control codes that may break output.
         """

src/textual/document/_syntax_aware_document.py

@@ -143,7 +143,7 @@ def get_line(self, index: int) -> str:
         """Return the string representing the line, not including new line characters.
 
         Args:
-            line_index: The index of the line.
+            index: The index of the line.
 
         Returns:
             The string representing the line.

src/textual/layout.py

@@ -106,7 +106,7 @@ def translate(
 
         Args:
             placements: List of placements.
-            offset: Offset to add to placements.
+            translate_offset: Offset to add to placements.
 
         Returns:
             Placements with adjusted region, or same instance if offset is null.

src/textual/screen.py

@@ -502,7 +502,7 @@ def arrange(self, size: Size, _optimal: bool = False) -> DockArrangeResult:
 
         Args:
             size: Size of container.
-            optimal: Ignored on screen.
+            _optimal: Ignored on screen.
 
         Returns:
             Widget locations.

src/textual/walk.py

@@ -181,7 +181,7 @@ def walk_selectable_widgets(
     Args:
         root: The root note (starting point).
         bounds: A Shape object that defines the selection bounds.
-        bounded: Container widgets that require a bounds check.
+        containers: Container widgets that require a bounds check.
 
     Returns:
         An iterable of DOMNodes.