Address PR feedback: Fix code style issues

Co-Authored-By: m@martinnormark.com <m@martinnormark.com>

Author: devin-ai-integration[bot]

PreMailer.Net/PreMailer.Net/PreMailer.cs

@@ -440,8 +440,7 @@ private Dictionary<IElement, List<StyleClass>> SortBySpecificity(
 					}
 					else // Ensure that existing inline styles always win.
 					{
-						var inlineStyle = _cssParser.ParseStyleClass("inline", styleAttr.Value);
-						sortedStyles.Add(inlineStyle);
+						sortedStyles.Add(_cssParser.ParseStyleClass("inline", styleAttr.Value));
 					}
 
 					result[style.Key] = sortedStyles;

PreMailer.Net/PreMailer.Net/StyleClass.cs

@@ -37,7 +37,7 @@ public StyleClass()
 		public void Merge(StyleClass styleClass, bool canOverwrite) {
 			foreach (var item in styleClass.Attributes) {
 				if (!Attributes.TryGetValue(item.Style, out var existing) ||
-				    (canOverwrite && (!existing.Important || item.Important))) // Overwrite if existing is not important or if new is important
+				    canOverwrite && (!existing.Important || item.Important))
 				{
 					Attributes.Merge(item);
 				}