fix: reinstate inclusive ranges

Author: timClicks

ch2/ch2-mandelbrot/src/main.rs

@@ -55,7 +55,7 @@ fn render_mandelbrot(escape_vals: Vec<Vec<usize>>) {
         0..=2 => ' ',
         3..=5 => '.',
         6..=10 => '•',
-        11..30 => '*',
+        11..=30 => '*',
         31..=100 => '+',
         101..=200 => 'x',
         201..=400 => '$',