fix: use proper line for processing

Plugin.cs

@@ -1,6 +1,5 @@
 using System.Runtime.InteropServices;
 using System.Text;
-using System.Text.RegularExpressions;
 using Dalamud.Game.Text.SeStringHandling;
 using Dalamud.Game.Text.SeStringHandling.Payloads;
 using Dalamud.Hooking;
@@ -131,16 +130,7 @@ public sealed class Plugin : IDalamudPlugin {
                 .Replace("<em>", Markers.EmphasisOn.ToString())
                 .Replace("</em>", Markers.EmphasisOff.ToString());
 
-            void Append() {
+            foreach (var ch in line) {
-                if (sb.Length == 0) {
-                    return;
-                }
-
-                seStringBuilder.AddText(sb.ToString());
-                sb.Clear();
-            }
-
-            foreach (var ch in lines[i].TrimEnd()) {
                 switch (ch) {
                     case Markers.EmphasisOn: {
                         Append();
@@ -160,6 +150,16 @@ public sealed class Plugin : IDalamudPlugin {
             }
 
             Append();
+            continue;
+
+            void Append() {
+                if (sb.Length == 0) {
+                    return;
+                }
+
+                seStringBuilder.AddText(sb.ToString());
+                sb.Clear();
+            }
         }
 
         var textBytes = seStringBuilder.Encode();