Application.css: no space after alpha (#929)

Spaces here aren't acceptable in GTK4

Author: danirabbit

data/Application.css

@@ -82,7 +82,7 @@
 }
 
 .cell.dim-label .event {
-    background: alpha (@base_color, 0.7);
+    background: alpha(@base_color, 0.7);
     color: @text_color;
 }
 
@@ -94,8 +94,8 @@ row:selected .event {
     background: @base_color;
     background-image: linear-gradient(to right, @selected_bg_color, @selected_bg_color);
     box-shadow:
-       0 1px 2px alpha (#000, 0.2),
-       0 1px 3px alpha (@selected_bg_color, 0.15);
+       0 1px 2px alpha(#000, 0.2),
+       0 1px 3px alpha(@selected_bg_color, 0.15);
    color: @selected_fg_color;
 }
 
@@ -106,7 +106,7 @@ row:selected .event {
 }
 
 #today #date {
-    background-color: alpha (@accent_color, 0.15);
+    background-color: alpha(@accent_color, 0.15);
     color: @accent_color;
     font-weight: 700;
 }