Disable extra display of 
 in nxml-mode (Bug#32897)

* lisp/nxml/nxml-mode.el (nxml-char-ref-display-extra): Don't put
display for the newline, it makes the indentation look wrong.

lisp/nxml/nxml-mode.el

@@ -2378,7 +2378,9 @@ With a prefix argument, inserts the character directly."
 (put 'nxml-char-ref 'evaporate t)
 
 (defun nxml-char-ref-display-extra (start end n)
-  (when nxml-char-ref-extra-display
+  (when (and ;; Displaying literal newline is unhelpful.
+         (not (eql n ?\n))
+         nxml-char-ref-extra-display)
     (let ((name (or (get-char-code-property n 'name)
                     (get-char-code-property n 'old-name)))
 	  (glyph-string (and nxml-char-ref-display-glyph-flag