-code-point, it should be a hexadecimal number (which is the convention
-for Unicode). The command then inserts the corresponding character
-into the buffer. For example, both of the following insert the
-infinity sign (Unicode code-point @code{U+221E}):
+code-point, it should be as a hexadecimal number (the convention for
+Unicode), or a number with a specified radix, e.g., @code{#o23072}
+(octal); @xref{Integer Basics,,, elisp, The Emacs Lisp Reference
+Manual}. The command then inserts the corresponding character into
+the buffer. For example, both of the following insert the infinity
+sign (Unicode code-point @code{U+221E}):