coding style: doc: remove empty lines at end of text files

Empty lines at end of text files are useless.
Remove them.

Change-Id: I30e4d3d03c4ce846aa7bcefa7366f88732275557
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5170
Tested-by: jenkins

NEWS-0.5.0

@@ -71,4 +71,3 @@ For older NEWS, see the NEWS files associated with each release
 For more information about contributing test reports, bug fixes, or new
 features and device support, please read the new Developer Manual (or
 the BUGS and PATCHES.txt files in the source archive).
-

TODO

@@ -392,4 +392,3 @@ to complete:
 /** @file
 This file contains the @ref thelist page.
 */
-

doc/fdl.texi

@@ -449,4 +449,3 @@ to permit their use in free software.
 @c Local Variables:
 @c ispell-local-pdict: "ispell-dict"
 @c End:
-