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_message.c

@@ -1390,9 +1390,9 @@ static const u8 sText_PkmnEagerForMore[] = _("{B_SCR_ACTIVE_NAME_WITH_PREFIX} is
 
 const u16 gBattlePalaceFlavorTextTable[] =
 {
-    [B_MSG_GLINT_IN_EYE]   = STRINGID_GLINTAPPEARSINEYE, 
+    [B_MSG_GLINT_IN_EYE]   = STRINGID_GLINTAPPEARSINEYE,
     [B_MSG_GETTING_IN_POS] = STRINGID_PKMNGETTINGINTOPOSITION,
-    [B_MSG_GROWL_DEEPLY]   = STRINGID_PKMNBEGANGROWLINGDEEPLY, 
+    [B_MSG_GROWL_DEEPLY]   = STRINGID_PKMNBEGANGROWLINGDEEPLY,
     [B_MSG_EAGER_FOR_MORE] = STRINGID_PKMNEAGERFORMORE,
 };