4 files changed, 9 insertions, 8 deletions

diff --git a/doc/lispref/control.texi b/doc/lispref/control.texi
index 63dc2f866af..d4520ebdee5 100644
--- a/doc/lispref/control.texi
+++ b/doc/lispref/control.texi
@@ -525,7 +525,7 @@ core pattern can have the following forms:
 
 @table @code
 
-@item _
+@item _@r{ (underscore)}
 Matches any @var{expval}.
 This is also known as @dfn{don't care} or @dfn{wildcard}.
 
diff --git a/doc/lispref/display.texi b/doc/lispref/display.texi
index 653b249a407..b98c2f8fa93 100644
--- a/doc/lispref/display.texi
+++ b/doc/lispref/display.texi
@@ -5057,7 +5057,7 @@ which are evaluated at display time.  This could be unsafe in certain
 situations, e.g., when the display specification was generated by some
 external program/agent.  Wrapping a display specification in a list
 that begins with the special symbol @code{disable-eval}, as in
-@w{@code{('disable-eval @var{spec})}}, will disable evaluation of any
+@w{@code{(disable-eval @var{spec})}}, will disable evaluation of any
 Lisp in @var{spec}, while still supporting all the other display
 property features.
 
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
diff --git a/doc/lispref/strings.texi b/doc/lispref/strings.texi
index 413e17750e9..78f1344cada 100644
--- a/doc/lispref/strings.texi
+++ b/doc/lispref/strings.texi
@@ -1348,7 +1348,7 @@ given width, if specified.
 This flag converts the substituted text to upper case (@pxref{Case
 Conversion}).
 
-@item _
+@item _@r{ (underscore)}
 This flag converts the substituted text to lower case (@pxref{Case
 Conversion}).
 @end table