Get rid of some tabs and trailing whitespaces

doc/vui.txt

@@ -175,4 +175,3 @@ by Christian Heine ( sennindemokrit at gmx dot net )
     Unless you are a perfectionist, don't bother. Media players ignore this
     setting, and favor their own (fixed) assumed Chroma Sample Location.
 
-

output/matroska_ebml.h

@@ -27,10 +27,10 @@
 #define X264_MATROSKA_EBML_H
 
 /* Matroska display size units from the spec */
-#define	DS_PIXELS        0
-#define	DS_CM            1
-#define	DS_INCHES        2
-#define	DS_ASPECT_RATIO  3
+#define DS_PIXELS        0
+#define DS_CM            1
+#define DS_INCHES        2
+#define DS_ASPECT_RATIO  3
 
 typedef struct mk_writer mk_writer;