diff --git a/pyWebLayout/abstract/inline.py b/pyWebLayout/abstract/inline.py
index 2cae0a9..d6e3263 100644
--- a/pyWebLayout/abstract/inline.py
+++ b/pyWebLayout/abstract/inline.py
@@ -72,8 +72,7 @@ class Word:
                 style = container.style
             else:
                 raise AttributeError(
-                    f"Container {
-                        type(container).__name__} must have a 'style' property")
+                    f"Container {type(container).__name__} must have a 'style' property")
 
         # Inherit background from container if not provided
         if background is None and hasattr(container, 'background'):
@@ -128,8 +127,7 @@ class Word:
                 container.add_word(word)
         else:
             raise AttributeError(
-                f"Container {
-                    type(container).__name__} must have an 'add_word' method")
+                f"Container {type(container).__name__} must have an 'add_word' method")
 
         return word
 
@@ -228,8 +226,7 @@ class FormattedSpan:
                 style = container.style
             else:
                 raise AttributeError(
-                    f"Container {
-                        type(container).__name__} must have a 'style' property")
+                    f"Container {type(container).__name__} must have a 'style' property")
 
         # Inherit background from container if not provided
         if background is None and hasattr(container, 'background'):
@@ -243,8 +240,7 @@ class FormattedSpan:
             container.add_span(span)
         else:
             raise AttributeError(
-                f"Container {
-                    type(container).__name__} must have an 'add_span' method")
+                f"Container {type(container).__name__} must have an 'add_span' method")
 
         return span