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-rw-r--r--lispref/nonascii.texi8
1 files changed, 5 insertions, 3 deletions
diff --git a/lispref/nonascii.texi b/lispref/nonascii.texi
index 2d6f21056e1..fbeedc191c8 100644
--- a/lispref/nonascii.texi
+++ b/lispref/nonascii.texi
@@ -176,9 +176,11 @@ If this is non-@code{nil}, it overrides @code{nonascii-insert-offset}.
@defun string-make-unibyte string
This function converts the text of @var{string} to unibyte
representation, if it isn't already, and returns the result. If
-@var{string} is a unibyte string, it is returned unchanged.
-Multibyte character codes are converted to unibyte
-by using just the low 8 bits.
+@var{string} is a unibyte string, it is returned unchanged. Multibyte
+character codes are converted to unibyte according to
+@code{nonascii-translation-table} or, if that is @code{nil}, using
+@code{nonascii-insert-offset}. If the lookup in the translation table
+fails, this function takes just the low 8 bits of each character.
@end defun
@defun string-make-multibyte string