string-to-multibyte
tan truncate
unibyte-char-to-multibyte upcase user-full-name
- user-login-name user-original-login-name user-variable-p
+ user-login-name user-original-login-name custom-variable-p
vconcat
window-buffer window-dedicated-p window-edges window-height
window-hscroll window-minibuffer-p window-width