`TextEditorResources.TextcontainerIsNotAnSource` in EditorFeatures.Text reads > textContainer is not an SourceTextContainer that was created from an ITextBuffer. That should be `a`, not `an`. (I assume it used to be an interface)
TextEditorResources.TextcontainerIsNotAnSourcein EditorFeatures.Text readsThat should be
a, notan. (I assume it used to be an interface)