Some minor Eldoc bugs

[Stephen Berman]

In GNU Emacs 23.0.60.5 (i686-pc-linux-gnu, GTK+ Version 2.12.0) of
2008-05-06 on escher I observe the following with eldoc-mode enabled:

When the echo area is displaying the eldoc info, typing a prefix
argument does not produce an echo; the echo appears only after typing
M-x:

1. emacs -Q
2. visit elisp file
3. M-x eldoc-mode
4. position the cursor so that an eldoc message appears in the echo
area
5. Type `C-u' or `C-u n' for some number n.  The eldoc message remains
and the prefix argument is not echoed.  (If after step 4 you type
`C-u' within eldoc-idle-delay seconds, then the prefix argument is
echoed.)
6. Continue with `M-x'.  Now the eldoc message is replaced by "C-u
M-x" or "n M-x" as appropriate.

=====================================================================
The eldoc message vanishes when point is
- within the parentheses of an arglist or list value of a variable or
  keyword
- between the quotation marks of a doc string or string value of a
  variable or keyword
The message reappears when point passes beyond these regions.

===================================================================== If
If the length of the eldoc message exceeds (window-width), only its tail is
displayed.  For example, in *scratch* put the cursor on
next-screen-context-lines; then echo area displays this (in an 80 column
window):

reen-context-lines: Number of lines of continuity when scrolling by screenfuls.


Steve Berman