bug#5288: 23.1; doc of load-history

[Drew Adams]

> Thanks, I've changed the docstring and manual to make this clearer.

Thanks.

FYI - These open bugs are also doc or message bugs.

1144 - No doc string for `symbol-at-point' and other, similar functions
1375 - Elisp manual node Special Properties
1749 - Emacs manual, node Mode Line
2792 - doc string of switch-to-buffer
2946 - output of describe-font-internal and doc string of font-info
2974 - Documentation incomplete for mode-line variables
3042 - display-visual class doc
3052 - please add doc strings for printing.el commands
3135 - doc of custom-variable-documentation
3137 - doc of compilation-get-file-structure
3138 - doc of ediff-patch-file
3227 - doc strings too wide
3249 - doc of transpose-subr and transpose-regions
3313 - Use Lisp strings for syntax descriptor examples
3320 - Rename `mini-' options
3371 - doc of `comment-style'
3393 - Document lisp-indent-function in Elisp manual
3503 - Emacs manual, main menu typo
3509 - improper quoting in (org)Special agenda views
3519 - (emacs)Init Examples: Rumsfeld is yesterday's news
3523 - "inferiors" -> "subnodes" in Detailed Node Listing
3524 - Use `emacs-lisp-mode-syntax-table' for NEWS
3525 - document `list-character-sets' in Emacs manual, node Charsets
3527 - Setting the default font using `menu-set-font'
3549 - Remove empty custom group `refill'
3564 - compose-region doc string
3566 - explain why not to use group defined by define-minor-mode
3575 - doc string of text-scale-increase should mention
       text-scale-decrease
3598 - doc string of frame-root-window
3599 - (elisp)Window Tree: Need to define root window
3615 - (elisp)Local Variables: xrefs to nodes for buffer-local
       and frame-local vars
3801 - Emacs manual: add index entry for "notation, keys"
       or "key notation"
3849 - Eshell manual - mostly empty etc.
3856 - doc string of `widget-complete'
3934 - Document `minibuffer-history-variable'
4162 - common doc strings that are too wide
4562 - Customize State button problems
4668 - two common doc strings too wide
       - shows up in most uses of `C-h m'