gnu: Fix misplaced commas (unquote).

Fix many occurrences of comma (unquote) being placed immediately after the
previous list item, e.g. ("ncurses", ncurses) in the inputs.

* gnu/packages/base.scm (patch, gnu-make),
  gnu/packages/bioinformatics.scm (hmmer),
  gnu/packages/bittorrent.scm (aria2),
  gnu/packages/compression.scm (pbzip2),
  gnu/packages/databases.scm (recutils),
  gnu/packages/fonts.scm (font-terminus),
  gnu/packages/freedesktop.scm (xdg-utils, elogind),
  gnu/packages/games.scm (gnujump),
  gnu/packages/gnome.scm (libidl, gnumeric, eog, gedit),
  gnu/packages/gnunet.scm (gnunet),
  gnu/packages/gnuzilla.scm (mozjs, nspr),
  gnu/packages/gtk.scm (gtksourceview, gdk-pixbuf),
  gnu/packages/lua.scm (lua),
  gnu/packages/openstack.scm (python-swiftclient),
  gnu/packages/perl.scm (perl-json-any),
  gnu/packages/polkit.scm (polkit-qt),
  gnu/packages/python.scm (wrap-python3, python-oauthlib)
  (python-mccabe-0.2.1, python-contextlib2, python2-rauth),
  gnu/packages/qt.scm (qtkeychain),
  gnu/packages/ruby.scm (ruby-nokogiri),
  gnu/packages/screen.scm (screen),
  gnu/packages/ssh.scm (libssh),
  gnu/packages/video.scm (ffmpeg, mplayer),
  gnu/packages/vim.scm (vim),
  gnu/packages/xdisorg.scm (redshift),
  gnu/packages/xfce.scm (xfce4-panel, xfce4-settings),
  gnu/packages/xnee.scm (xnee),
  gnu/packages/xorg.scm (font-adobe100dpi, font-adobe75dpi),
  gnu/packages/zsh.scm (zsh): Fix misplaced commas (unquote).

gnu/packages/ruby.scm

@@ -1905,7 +1905,7 @@ to reproduce user environments.")
                                         "/include/libxml2" ))))
     (native-inputs
      `(("ruby-hoe" ,ruby-hoe)
-       ("ruby-rake-compiler", ruby-rake-compiler)))
+       ("ruby-rake-compiler" ,ruby-rake-compiler)))
     (inputs
      `(("zlib" ,zlib)
        ("libxml2" ,libxml2)