Removed trailing spaces in the most relevant files

Command used for the job:
egrep -rl ' $' --include *.c --include *.h --include  *.s --include  *.inc --include  *.txt *  | xargs sed -i 's/\s\+$//g'

Credits to Grant Murphy from Stack Overflow.

src/battle_anim_ground.c

@@ -186,7 +186,7 @@ static void AnimBoneHitProjectile(struct Sprite *sprite)
     InitSpritePosToAnimTarget(sprite, TRUE);
     if (GetBattlerSide(gBattleAnimAttacker) != B_SIDE_PLAYER)
         gBattleAnimArgs[2] = -gBattleAnimArgs[2];
-    
+
     sprite->data[0] = gBattleAnimArgs[4];
     sprite->data[2] = GetBattlerSpriteCoord(gBattleAnimTarget, 2) + gBattleAnimArgs[2];
     sprite->data[4] = GetBattlerSpriteCoord(gBattleAnimTarget, 3) + gBattleAnimArgs[3];