Reword RETURN VALUE text.

man2/readlink.2

@@ -67,10 +67,13 @@ It will truncate the contents (to a length of
 .I bufsiz
 characters), in case the buffer is too small to hold all of the contents.
 .SH "RETURN VALUE"
-The call returns the count of characters placed in the buffer
-if it succeeds, or \-1 if an error occurs, placing the error
-code in
-.IR errno .
+On success,
+.BR readlink ()
+returns the number of bytes placed in
+.IR buf .
+On error, \-1 is returned and
+.I errno
+is set to indicate the error.
 .SH ERRORS
 .TP
 .B EACCES