AdjustLineNumberMarginOnZoom

Add the following lines to ~/.textadept/init.lua to adjust the line number margin on zoom:

-- adjust line number margin on zoom
events.connect('events.zoom', function()
  local width = #(buffer.line_count..'')
  width = width > 4 and width or 4
  view.margin_width_n[1] = 4 + width * view:text_width(view.STYLE_LINENUMBER, '9')
end)