Simplify logic in list commands bg_color() func

This is an equivalent boolean statement making it easier to read.

<!-- ps-id: 41f6a1fa-4ce5-4446-b32e-369d695f9089 -->

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Signed-off-by: Drew De Ponte <cyphactor@gmail.com>

src/ps/public/list.rs

@@ -68,14 +68,8 @@ fn bg_color(
 ) -> Option<ansi_term::Colour> {
     let super_light_gray = Fixed(237);
 
-    if alternate_patch_series_bg_colors {
-        if (is_connected_to_prev_row && prev_row_showed_color)
-            || (!is_connected_to_prev_row && !prev_row_showed_color)
-        {
-            Some(super_light_gray)
-        } else {
-            None
-        }
+    if alternate_patch_series_bg_colors && is_connected_to_prev_row == prev_row_showed_color {
+        Some(super_light_gray)
     } else {
         None
     }