Fix typos

Fixes typos in source comments.

gtk2_ardour/public_editor.h

@@ -240,10 +240,10 @@ public:
 	/** Open stem export dialog */
 	virtual void stem_export () = 0;
 
-	/** Open export dialog with current selection pre-selected */
+	/** Open export dialog with current selection preselected */
 	virtual void export_selection () = 0;
 
-	/** Open export dialog with current range pre-selected */
+	/** Open export dialog with current range preselected */
 	virtual void export_range () = 0;
 
 	/** Open Simple Export Dialog */

gtk2_ardour/strip_import_dialog.cc

@@ -478,7 +478,7 @@ StripImportDialog::refill_import_table ()
 		next_new = PBD::ID (next_id);
 	}
 
-	/* accumulate both dropdowns, so colums are equally spaced */
+	/* accumulate both dropdowns, so columns are equally spaced */
 	std::vector<std::string> sizing_texts;
 
 	_add_rid_dropdown = manage (new ArdourWidgets::ArdourDropdown ());

share/scripts/brutalize_midi.lua

@@ -34,7 +34,7 @@ function factory () return function ()
 	local rv = LuaDialog.Dialog ("Select Automation State", dialog_options):run()
 	if not rv then return end
 
-	-- calclate max distance in 'ticks'
+	-- calculate max distance in 'ticks'
 	local ticks_per_beat = Temporal.Beats (1, 0):to_ticks ();
 	local max_distance   = ticks_per_beat / rv['divisor']