gnu: Adjust formatting as recommended by 'guix lint'.
* gnu/packages/aidc.scm (barcode, qrencode),
gnu/packages/bash.scm (bash, bash-completion),
gnu/packages/busybox.scm (busybox),
gnu/packages/cdrom.scm (cdparanoia),
gnu/packages/cmake.scm (cmake),
gnu/packages/conkeror.scm (conkeror),
gnu/packages/cook.scm (cook),
gnu/packages/curl.scm (curl),
gnu/packages/docbook.scm (docbook-xsl),
gnu/packages/enlightenment.scm (enlightenment),
gnu/packages/games.scm (abbaye),
gnu/packages/geeqie.scm (exiv2),
gnu/packages/gimp.scm (gegl),
gnu/packages/gl.scm (glu, freeglut, ftgl),
gnu/packages/glib.scm (glib),
gnu/packages/gnome.scm (orbit2, gconf, geocode-glib),
gnu/packages/gstreamer.scm (gstreamer, gst-plugins-base),
gnu/packages/linux.scm (util-linux),
gnu/packages/lisp.scm (gcl, ecl),
gnu/packages/maths.scm (gnuplot, hdf5),
gnu/packages/ssh.scm (dropbear),
gnu/packages/web.scm (json-c): Remove tabulations and trailing
white spaces or reformat to fit within 80 columns.
* gnu/packages/audio.scm (aubio),
gnu/packages/emacs.scm (emacs-s),
gnu/packages/engineering.scm (geda-gaf),
gnu/packages/games.scm (dosbox),
gnu/packages/gnome.scm (gusb),
gnu/packages/gtk.scm (gtk+),
gnu/packages/guile.scm (guile-wisp),
gnu/packages/hurd.scm (hurd-headers),
gnu/packages/wm.scm (i3-wm): Adjust synopsis or description.
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