fix misspelled 'an other' -> 'another'

pcbnew/editrack-part2.cpp

@@ -270,7 +270,7 @@ int PCB_EDIT_FRAME::EraseRedundantTrack( wxDC*              aDC,
     // is fully inside a pad, MarkTrace does not find correctly the full trace,
     // because the entire track is the set of segments between 2 nodes
     // (pads or point connecting more than 2 items)
-    // so use an other (better) starting segment in this case
+    // so use another (better) starting segment in this case
     TRACK* track_segment = aNewTrack;
 
     for( int ii = 0; ii < aNewTrackSegmentsCount; ii++ )

pcbnew/menubar_pcb_editor.cpp

@@ -556,7 +556,7 @@ void prepareEditMenu( wxMenu* aParentMenu, bool aUseGal )
 
     AddMenuItem( aParentMenu, ID_MENU_PCB_SWAP_LAYERS,
                  _( "&Move and Swap Layers..." ),
-                 _( "Move tracks or drawings from a layer to an other layer" ),
+                 _( "Move tracks or drawings from a layer to another layer" ),
                  KiBitmap( swap_layer_xpm ) );
 
     aParentMenu->AppendSeparator();

pcbnew/pcb_base_frame.cpp

@@ -145,7 +145,7 @@ bool PCB_BASE_FRAME::Update3DView( const wxString* aTitle )
     if( draw3DFrame == NULL )
         return false;
 
-    // Ensure the viewer was created by me, and not by an other editor:
+    // Ensure the viewer was created by me, and not by another editor:
     PCB_BASE_FRAME* owner = draw3DFrame->Parent();
 
     // if I am not the owner, do not use the current viewer instance
@@ -434,7 +434,7 @@ bool PCB_BASE_FRAME::CreateAndShow3D_Frame( bool aForceRecreateIfNotOwner )
 {
     EDA_3D_VIEWER* draw3DFrame = Get3DViewerFrame();
 
-    // Ensure the viewer was created by me, and not by an other editor:
+    // Ensure the viewer was created by me, and not by another editor:
     PCB_BASE_FRAME* owner = draw3DFrame ? draw3DFrame->Parent() : nullptr;
 
     // if I am not the owner, do not use the current viewer instance