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-rw-r--r--doc/lispref/nonascii.texi11
1 files changed, 6 insertions, 5 deletions
diff --git a/doc/lispref/nonascii.texi b/doc/lispref/nonascii.texi
index d7d25dc36af..6dc23637a79 100644
--- a/doc/lispref/nonascii.texi
+++ b/doc/lispref/nonascii.texi
@@ -280,11 +280,12 @@ to the codepoints @code{#x3FFF80} through @code{#x3FFFFF}, inclusive
@defun string-to-unibyte string
This function returns a unibyte string containing the same sequence of
-characters as @var{string}. It signals an error if @var{string}
-contains a non-@acronym{ASCII} character. If @var{string} is a
-unibyte string, it is returned unchanged. Use this function for
-@var{string} arguments that contain only @acronym{ASCII} and eight-bit
-characters.
+characters as @var{string}. If @var{string} is a unibyte string, it
+is returned unchanged. Otherwise, @acronym{ASCII} characters and
+characters in the @code{eight-bit} charset are converted to their
+corresponding byte values. Use this function for @var{string}
+arguments that contain only @acronym{ASCII} and eight-bit characters;
+the function signals an error if any other characters are encountered.
@end defun
@defun byte-to-string byte