Use consistent line ending.

Author: JimBobSquarePants

tests/ImageSharp.Drawing.Tests/Drawing/Text/DrawTextOnImageTests.cs

@@ -269,7 +269,7 @@ public void FontShapesAreRenderedCorrectly_LargeText<TPixel>(
         string str = Repeat(" ", 78) + "THISISTESTWORDSTHISISTESTWORDSTHISISTESTWORDSTHISISTESTWORDSTHISISTESTWORDS";
         sb.Append(str);
 
-        string newLines = Repeat(Environment.NewLine, 31);
+        string newLines = Repeat("\r\n", 31);
         sb.Append(newLines);
 
         for (int i = 0; i < 10; i++)