v vet: give an error for trailing whitespace (#9574)

vlib/x/ttf/text_block.v

@@ -10,7 +10,7 @@ module ttf
 *
 * Note:
 *
-* TODO: 
+* TODO:
 **********************************************************************/
 pub struct Text_block {
 	x         int  // x postion of the left high corner

vlib/x/ttf/ttf.v

@@ -9,9 +9,9 @@ module ttf
 * that can be found in the LICENSE file.
 *
 * Note:
-* - inspired by: http://stevehanov.ca/blog/?id=143 
+* - inspired by: http://stevehanov.ca/blog/?id=143
 *
-* TODO: 
+* TODO:
 * - check for unicode > 0xFFFF if supported
 * - evaluate use a buffer for the points in the glyph
 **********************************************************************/