Fix text align for buffer-face-mode

sideline.el

@@ -302,7 +302,7 @@
 (defun sideline--align-right (str offset)
   "Align sideline STR from the right of the window.
 
- Argument OFFSET is additional calculation from the right alignment."
+Argument OFFSET is additional calculation from the right alignment."
   (list (+
          ;; If the sideline text is displayed without at least 1 pixel gap from the right fringe and
          ;; overflow-newline-into-fringe is not true, emacs will line wrap it.
@@ -312,11 +312,13 @@
              1
            0)
          (* (window-font-width)
-            (+ offset (if (display-graphic-p)
-                          ;; If right fringe deactivated add 1 offset
-                          (if (= 0 (nth 1 (window-fringes))) 1 0)
-                        1)))
-         (sideline--string-pixel-width str))))
+            (+ offset
+               (if (display-graphic-p)
+                   ;; If right fringe deactivated add 1 offset
+                   (if (= 0 (nth 1 (window-fringes))) 1 0)
+                 1)
+               (length str)))
+         )))
 
 (defun sideline--get-line ()
   "Return current line."