bug#24407: 24.5; doc of `format'

[Drew Adams]

The Elisp manual doc for `format' (node Formatting Strings) looks OK.
But the doc string has this bug:

  where flags is [+ #-0]+, width is [0-9]+, and precision is .[0-9]+

                                  must be a literal `.' here ^

The precision part should be this (or equivalent): "[.][0-9]+", not
".[0-9]+".


In GNU Emacs 24.5.1 (i686-pc-mingw32)
 of 2015-04-11 on LEG570
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
 `configure --prefix=/c/usr --host=i686-pc-mingw32'