finish implementing selection

src/main.odin

@@ -88,11 +88,12 @@ main :: proc() {
 			char := chars[0]
 			// TODO: selection
 			if selection.active {
-
+				delete_selection()
-			} else {
+				selection.active = false
-				inject_at(&lines[cursor.line], cursor.char, char)
-				cursor.char += 1
 			}
+
+			inject_at(&lines[cursor.line], cursor.char, char)
+			cursor.char += 1
 		}
 
 		move_cursor()