bug#30297: 27.0.50; *Help* shows inaccurate arglist for json-parse-string

[Basil L. Contovounesios]

0001-Fix-arglist-doc-of-json-parse-functions.patch
Description: Text Data

Seen on latest master:

1. emacs -Q
2. C-h f json-parse-string RET

*Help* reports the following arglist:

  (json-parse-string &key (OBJECT-TYPE 'hash-table))

despite mention of the positional argument STRING in the rest of the
docstring.

Attached is a doc fix suggestion.

Thanks,

-- 
Basil

In GNU Emacs 27.0.50 (build 3, x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll 
bars)
 of 2018-01-30 built on thunk
Repository revision: 2b0bcbbaa64f95c14deed89fdf279d8be48ee352
Windowing system distributor 'The X.Org Foundation', version 11.0.11905000
System Description: Debian GNU/Linux buster/sid

Quit
Configured using:
 'configure --config-cache --prefix=/home/blc/.local --with-mailutils
 --with-x-toolkit=lucid --with-modules --with-file-notification=yes
 --with-x 'CFLAGS=-flto -fomit-frame-pointer -march=native -maes -mavx
 -mcrc32 -mf16c -mfpmath=sse -mfsgsbase -mfxsr -minline-all-stringops
 -mmmx -mpclmul -mpopcnt -msahf -msse4.2 -mxsave -mxsaveopt -mvzeroupper
 -O2 -pipe' LDFLAGS=-flto'

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS LUCID X11 MODULES THREADS LIBSYSTEMD JSON LCMS2