Fix cursor thickness on wide cells

Fixes #4922.

CHANGELOG.md

@@ -23,6 +23,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Text selected after search without any match
 - Incorrect vi cursor position after leaving search
 - Clicking on URLs on Windows incorrectly opens File Explorer
+- Incorrect underline cursor thickness on wide cell
 
 ### Removed
 

alacritty/src/display/cursor.rs

@@ -22,12 +22,12 @@ impl IntoRects for RenderableCursor {
         let mut width = size_info.cell_width();
         let height = size_info.cell_height();
 
+        let thickness = (thickness * width as f32).round().max(1.);
+
         if self.is_wide() {
             width *= 2.;
         }
 
-        let thickness = (thickness * width as f32).round().max(1.);
-
         match self.shape() {
             CursorShape::Beam => beam(x, y, height, thickness, self.color()),
             CursorShape::Underline => underline(x, y, width, height, thickness, self.color()),