Fix source comment / documentation typos

pcbnew/tools/pcb_selection_tool.cpp

@@ -218,7 +218,7 @@ void PCB_SELECTION_TOOL::setModifiersState( bool aShiftState, bool aCtrlState, b
     // from the state of modifier keys SHIFT, CTRL, ALT and the OS
 
     // on left click, a selection is made, depending on modifiers ALT, SHIFT, CTRL:
-    // Due to the fact ALT key modifier cannot be useed freely on Winows and Linux,
+    // Due to the fact ALT key modifier cannot be used freely on Winows and Linux,
     // actions are different on OSX and others OS
     // Especially, ALT key cannot be used to force showing the full selection choice
     // context menu (the menu is immediately closed on Windows )
@@ -558,7 +558,7 @@ PCB_SELECTION& PCB_SELECTION_TOOL::RequestSelection( CLIENT_SELECTION_FILTER aCl
         // Unhighlight the BEFORE items before highlighting the AFTER items.
         // This is so that in the case of groups, if aClientFilter replaces a selection
         // with the enclosing group, the unhighlight of the element doesn't undo the
-        // recursive highlighting of that elemetn by the group.
+        // recursive highlighting of that element by the group.
 
         for( std::pair<EDA_ITEM* const, DISPOSITION> itemDisposition : itemDispositions )
         {