bug#28604: 25.3.50; Outdated INR Symbol

[quark]

\rupee gives ₨

However, the sign of INR has changed to ₹
(https://en.wikipedia.org/wiki/Indian_rupee)

In GNU Emacs 25.3.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.22.21)
 of 2017-09-14 built on proton
Repository revision: 1d81ac1b38cd36b144b4108e3242dbb028fd9c5f
Windowing system distributor 'The X.Org Foundation', version 11.0.11903000
Configured using:
 'configure --with-x-toolkit=gtk'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: ERC

Minor modes in effect:
  cursor-intangible-mode: t
  erc-spelling-mode: t
  flyspell-mode: t
  erc-notifications-mode: t
  erc-log-mode: t
  global-hl-line-mode: t
  projectile-mode: t
  global-diff-hl-mode: t
  diff-auto-refine-mode: t
  magit-auto-revert-mode: t
  global-auto-revert-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  global-flycheck-mode: t
  flycheck-mode: t
  global-auto-complete-mode: t
  display-time-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  pyvenv-mode: t
  shell-dirtrack-mode: t
  smartparens-global-mode: t
  erc-list-mode: t
  erc-menu-mode: t
  erc-autojoin-mode: t
  erc-ring-mode: t
  erc-networks-mode: t
  erc-pcomplete-mode: t
  erc-track-mode: t
  erc-track-minor-mode: t
  erc-match-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-netsplit-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-keep-place-mode: t
  erc-move-to-prompt-mode: t
  erc-readonly-mode: t
  show-paren-mode: t
  save-place-mode: t
  ido-everywhere: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Memory information:
((conses 16 742235 91834)
 (symbols 48 82184 5)
 (miscs 40 446 939)
 (strings 32 239660 27405)
 (string-bytes 1 11366687)
 (vectors 16 105232)
 (vector-slots 8 1395227 51155)
 (floats 8 784 573)
 (intervals 56 2833 1318)
 (buffers 976 39))