Remove useless whitespaces and warp long lines.

debian/copyright

@@ -20,8 +20,9 @@ License: LGPL-2.1+
  .
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.
  .
  On Debian systems, the complete text of the GNU Lesser General
- Public License version 2.1 can be found in "/usr/share/common-licenses/LGPL-2.1".
+ Public License version 2.1 can be found in
+ "/usr/share/common-licenses/LGPL-2.1".