Document return values of the various read-* functions

* lisp/textmodes/string-edit.el (read-string-from-buffer):
* lisp/simple.el (read-from-kill-ring, read-shell-command)
(read-signal-name):
* lisp/replace.el (read-regexp-case-fold-search):
* lisp/auth-source.el (read-passwd):
* lisp/subr.el (read-key, read-number):
* lisp/minibuffer.el (read-file-name, read-no-blanks-input):
* lisp/international/mule-cmds.el (read-multilingual-string):
* lisp/language/japan-util.el (read-hiragana-string):
* lisp/files-x.el (read-file-local-variable)
(read-file-local-variable-mode, read-file-local-variable-value):
* lisp/faces.el (read-face-font, read-face-name):
* lisp/simple.el (read-extended-command):
* lisp/env.el (read-envvar-name):
* lisp/files.el (read-directory-name):
* lisp/faces.el (read-color):
* lisp/international/mule-diag.el (read-charset):
* lisp/emacs-lisp/map-ynp.el (read-answer):
* src/coding.c (Fread_coding_system)
(Fread_non_nil_coding_system):
* src/minibuf.c (Fread_command, Fread_from_minibuffer):
* src/lread.c (Fread_char, Fread_char_exclusive, Fread_event): Doc
fixes.

1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/language/japan-util.el b/lisp/language/japan-util.el
index c61e98c8fca..718c469d562 100644
--- a/lisp/language/japan-util.el
+++ b/lisp/language/japan-util.el
@@ -317,7 +317,8 @@ Optional argument KATAKANA-ONLY non-nil means to convert only KATAKANA char."
 ;;;###autoload
 (defun read-hiragana-string (prompt &optional initial-input)
   "Read a Hiragana string from the minibuffer, prompting with string PROMPT.
-If non-nil, second arg INITIAL-INPUT is a string to insert before reading."
+If non-nil, second arg INITIAL-INPUT is a string to insert before reading.
+Return the string read from the minibuffer."
   (read-multilingual-string prompt initial-input "japanese-hiragana"))
 
 ;;