Avoid showing a extra digit for addresses

The address space range is non-inclusive, so the last possible address
is one less than the range.

src/lib.rs

@@ -203,7 +203,7 @@ impl MemoryEditor {
  let line_height = self.get_line_height(ui);
  let address_space = self.address_ranges.get(&selected_address_range).unwrap().clone();
  // This is janky, but can't think of a better way.
- let address_characters = format!("{:X}", address_space.end).chars().count();
+ let address_characters = format!("{:X}", address_space.end -1).chars().count();
  let max_lines = (address_space.len() + column_count - 1) / column_count; // div_ceil
 
  // For when we're editing memory, don't use the `Response` object as that would screw over downward scrolling.