Ensure only trailing whitespace is trimmed.

src/SixLabors.Fonts/TextLayout.cs

@@ -1396,7 +1396,7 @@ private void TrimTrailingWhitespaceAndRecalculateMetrics()
                 index--;
             }
 
-            if (index < this.data.Count)
+            if (index < this.data.Count && index != 0)
             {
                 this.data.RemoveRange(index, this.data.Count - index);
             }

tests/SixLabors.Fonts.Tests/Issues/Issues_400.cs

@@ -0,0 +1,25 @@
+// Copyright (c) Six Labors.
+// Licensed under the Six Labors Split License.
+
+namespace SixLabors.Fonts.Tests.Issues;
+public class Issues_400
+{
+    [Fact]
+    public void RenderingTextIncludesAllGlyphs()
+    {
+#if OS_WINDOWS
+
+        TextOptions options = new(new Font(SystemFonts.Get("Arial"), 16 * 2))
+        {
+            WrappingLength = 1900
+        };
+
+        const string content = """
+                          NEWS_CATEGORY=EWF&NEWS_HASH=4b298ff9277ef9fdf515356be95ea3caf57cd36&OFFSET=0&SEARCH_VALUE=CA88105E1088&ID_NEWS
+          """;
+
+        int lineCount = TextMeasurer.CountLines(content, options);
+        Assert.Equal(2, lineCount);
+#endif
+    }
+}

tests/SixLabors.Fonts.Tests/SixLabors.Fonts.Tests.csproj

@@ -3,6 +3,7 @@
   <PropertyGroup>
     <DebugSymbols>True</DebugSymbols>
     <Platforms>AnyCPU;x64;x86</Platforms>
+    <LangVersion>11</LangVersion>
   </PropertyGroup>
 
   <PropertyGroup>