Fixing logic

Author: StanleyGoldman

src/GitHub.UI/Controls/AutoCompleteBox/AutoCompleteTextInputExtensions.cs

@@ -25,8 +25,8 @@ public static string GetExpandedText(this IAutoCompleteTextInput textInput, stri
 
             var currentText = textInput.Text ?? ""; // Playing it safe
 
-            if(offset <= currentText.Length) throw new InvalidOperationException("The offset can't be larger than the current text length");
-            if(afterIndex <= currentText.Length) throw new InvalidOperationException("The afterIndex can't be larger than the current text length");
+            if (offset > currentText.Length) throw new InvalidOperationException("The offset can't be larger than the current text length");
+            if (afterIndex > currentText.Length) throw new InvalidOperationException("The afterIndex can't be larger than the current text length");
 
             var before = currentText.Substring(0, offset);
             var after = currentText.Substring(afterIndex);