Minor fixes for the last commits

* src/fns.c (Fbase64url_encode_region)
(Fbase64url_encode_string, Fbase64_decode_region)
(Fbase64_decode_string): Fix doc strings.
(base64_decode_1): Minor stylistic code changes.

* doc/lispref/text.texi (Base 64): Fix typos and improve
wording of the last committed text.

Author: Eli-Zaretskii

doc/lispref/text.texi

@@ -4541,7 +4541,7 @@ Internet informational document describing a standard.  RFCs are
 usually written by technical experts acting on their own initiative,
 and are traditionally written in a pragmatic, experience-driven
 manner.
-}2045 and also in RFC4648.  This section describes the functions for
+}2045 and also in RFC 4648.  This section describes the functions for
 converting to and from this code.
 
 @deffn Command base64-encode-region beg end &optional no-line-break
@@ -4559,19 +4559,13 @@ the output is just one long line.
 @end deffn
 
 @deffn Command base64url-encode-region beg end &optional no-pad
-This function converts the region from @var{beg} to @var{end} into base
-64 code.  It returns the length of the encoded text.  An error is
-signaled if a character in the region is multibyte, i.e., in a
-multibyte buffer the region must contain only characters from the
-charsets @code{ascii}, @code{eight-bit-control} and
-@code{eight-bit-graphic}.
-
-Contrary to the function @code{base64-encode-region}, this function
-doesnt inserts newline characters into the encoded text, so the output
-is just one long line.
+This function is like @code{base64-encode-region}, but it implements
+the URL variant if base 64 encoding, per RFC 4648, and it doesn't
+inserts newline characters into the encoded text, so the output is
+just one long line.
 
-If the optional argument @var{no-pad} is non-@code{nil} then padding
-(@code{=}) isn't generated.
+If the optional argument @var{no-pad} is non-@code{nil} then this
+function doesn't generate the padding (@code{=}).
 @end deffn
 
 @defun base64-encode-string string &optional no-line-break
@@ -4587,17 +4581,12 @@ the result string is just one long line.
 @end defun
 
 @defun base64url-encode-string string &optional no-pad
-This function converts the string @var{string} into base 64 url code
-(see RFC4648).  It returns a string containing the encoded text.  As
-for @code{base64url-encode-region}, an error is signaled if a
-character in the string is multibyte.
+Like @code{base64-encode-string}, but generates the URL variant of
+base 64, and doesn't insert newline characters into the encoded text,
+so the result is just one long line.
 
-Contrary to @code{base64-encode-string}, this function doesnt inserts
-newline characters into the encoded text, so the result string is just
-one long line.
-
-If the optional argument @var{no-pad} is non-@code{nil} then padding
-(@code{=}) isn't generated.
+If the optional argument @var{no-pad} is non-@code{nil} then this
+function doesn't generate the padding.
 @end defun
 
 @deffn Command base64-decode-region beg end &optional base64url
@@ -4607,8 +4596,8 @@ the decoded text.
 
 The decoding functions ignore newline characters in the encoded text.
 
-If optional argument @var{base64url} is is non-@code{nil} then padding
-become optionnal and url variant is used (see RFC4648).
+If optional argument @var{base64url} is is non-@code{nil}, then padding
+is optional, and the URL variant of base 64 encoding is used.
 @end deffn
 
 @defun base64-decode-string string &optional base64url
@@ -4618,8 +4607,9 @@ decoded text.
 
 The decoding functions ignore newline characters in the encoded text.
 
-If optional argument @var{base64url} is is non-@code{nil} then padding
-become optionnal and url variant is used (see RFC4648).
+
+If optional argument @var{base64url} is is non-@code{nil}, then padding
+is optional, and the URL variant of base 64 encoding is used.
 @end defun
 
 @node Checksum/Hash

src/fns.c

@@ -3317,7 +3317,7 @@ DEFUN ("base64url-encode-region", Fbase64url_encode_region, Sbase64url_encode_re
 Return the length of the encoded text.
 Optional second argument NO-PAD means do not add padding char =.
 
-This is the variant defined in RFC4648.  */)
+This produces the URL variant of base 64 encoding defined in RFC 4648.  */)
   (Lisp_Object beg, Lisp_Object end, Lisp_Object no_pad)
 {
   return base64_encode_region_1(beg, end, false, NILP(no_pad), true);
@@ -3396,7 +3396,7 @@ DEFUN ("base64url-encode-string", Fbase64url_encode_string, Sbase64url_encode_st
        doc: /* Base64url-encode STRING and return the result.
 Optional second argument NO-PAD means do not add padding char =.
 
-This is the variant defined in RFC4648.  */)
+This produces the URL variant of base 64 encoding defined in RFC 4648.  */)
   (Lisp_Object string, Lisp_Object no_pad)
 {
 
@@ -3553,8 +3553,8 @@ DEFUN ("base64-decode-region", Fbase64_decode_region, Sbase64_decode_region,
        doc: /* Base64-decode the region between BEG and END.
 Return the length of the decoded text.
 If the region can't be decoded, signal an error and don't modify the buffer.
-Optional third argument BASE64URL define if base64Url variant will be used
-see RFC4648.  */)
+Optional third argument BASE64URL determines whether to use the URL variant
+of the base 64 encoding, as defined in RFC 4648.  */)
      (Lisp_Object beg, Lisp_Object end, Lisp_Object base64url)
 {
   ptrdiff_t ibeg, iend, length, allength;
@@ -3615,9 +3615,9 @@ see RFC4648.  */)
 
 DEFUN ("base64-decode-string", Fbase64_decode_string, Sbase64_decode_string,
        1, 2, 0,
-       doc: /* Base64-decode STRING and return the result
-Optional argument BASE64URL define if base64Url variant will be used
-see RFC4648.  */)
+       doc: /* Base64-decode STRING and return the result as a string.
+Optional argument BASE64URL determines whether to use the URL variant of
+the base 64 encoding, as defined in RFC 4648.  */)
      (Lisp_Object string, Lisp_Object base64url)
 {
   char *decoded;
@@ -3693,13 +3693,9 @@ base64_decode_1 (const char *from, char *to, ptrdiff_t length,
       /* Process third byte of a quadruplet.  */
 
       if (!base64url)
-	{
-	  READ_QUADRUPLET_BYTE (-1);
-	}
+	READ_QUADRUPLET_BYTE (-1);
       else
-	{
-	  READ_QUADRUPLET_BYTE (e-to);
-	}
+	READ_QUADRUPLET_BYTE (e-to);
 
       if (c == '=')
 	{
@@ -3724,13 +3720,9 @@ base64_decode_1 (const char *from, char *to, ptrdiff_t length,
       /* Process fourth byte of a quadruplet.  */
 
       if (!base64url)
-	{
-	  READ_QUADRUPLET_BYTE (-1);
-	}
+	READ_QUADRUPLET_BYTE (-1);
       else
-	{
-	  READ_QUADRUPLET_BYTE (e-to);
-	}
+	READ_QUADRUPLET_BYTE (e-to);
 
       if (c == '=')
 	continue;