Introduce end-of-line normalization

Ensures that all files that Git considers to be text will have
normalized (LF) line endings in the repository. When core.eol is set to
native (which is the default), Git will convert the line endings of
normalized files in your working directory back to your platform's
native line ending.

See also https://git-scm.com/docs/gitattributes

lib-src/mod-track-panel/TrackPanel2.h

@@ -1,44 +1,44 @@
-/**********************************************************************
-
-  Audacity: A Digital Audio Editor
-
-  TrackPanel2.h
-
-  James Crook
-
-**********************************************************************/
-
-#ifndef __AUDACITY_TRACK_PANEL2__
-#define __AUDACITY_TRACK_PANEL2__
-
-#include "TrackPanel.h"
-
-class TrackPanel2 : public TrackPanel
-{
-public:
-   TrackPanel2( 
-      wxWindow * parent, wxWindowID id,
-      const wxPoint & pos,
-      const wxSize & size,
-      TrackList * tracks,
-      ViewInfo * viewInfo,
-      TrackPanelListener * listener,
-      AdornedRulerPanel * ruler);
-
-   // Upgrades an existing TrackPanel to a TrackPanel2
-   static void Upgrade( TrackPanel ** ppTrackPanel );
-
-   virtual void OnPaint(wxPaintEvent & event);
-};
-
-// Factory function.
-TrackPanel * TrackPanel2Factory(wxWindow * parent,
-   wxWindowID id,
-   const wxPoint & pos,
-   const wxSize & size,
-   TrackList * tracks,
-   ViewInfo * viewInfo,
-   TrackPanelListener * listener,
-   AdornedRulerPanel * ruler);
-
-#endif
+/**********************************************************************
+
+  Audacity: A Digital Audio Editor
+
+  TrackPanel2.h
+
+  James Crook
+
+**********************************************************************/
+
+#ifndef __AUDACITY_TRACK_PANEL2__
+#define __AUDACITY_TRACK_PANEL2__
+
+#include "TrackPanel.h"
+
+class TrackPanel2 : public TrackPanel
+{
+public:
+   TrackPanel2( 
+      wxWindow * parent, wxWindowID id,
+      const wxPoint & pos,
+      const wxSize & size,
+      TrackList * tracks,
+      ViewInfo * viewInfo,
+      TrackPanelListener * listener,
+      AdornedRulerPanel * ruler);
+
+   // Upgrades an existing TrackPanel to a TrackPanel2
+   static void Upgrade( TrackPanel ** ppTrackPanel );
+
+   virtual void OnPaint(wxPaintEvent & event);
+};
+
+// Factory function.
+TrackPanel * TrackPanel2Factory(wxWindow * parent,
+   wxWindowID id,
+   const wxPoint & pos,
+   const wxSize & size,
+   TrackList * tracks,
+   ViewInfo * viewInfo,
+   TrackPanelListener * listener,
+   AdornedRulerPanel * ruler);
+
+#endif