Oops - I found two typos (one because I write so much texinfo ...).

See updated attachment.  Or (if already applied), make these two fixes:

22c22
< +    <code>(- <var>end</var> <var>start</var><code>)</code> is odd,
---
> +    <code>(- <var>end</var> <var>start</var>)</code> is odd,
94c94
< +    <p>This procedure is similar to SRFI-13's @code{xsubstring}.
---
> +    <p>This procedure is similar to SRFI-13's <code>xsubstring</code>.

--
	--Per Bothner
xxxxxx@bothner.com   http://per.bothner.com/