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/menu.c

@@ -62,11 +62,11 @@ static EWRAM_DATA void *sTempTileDataBuffer[0x20] = {NULL};
 
 const u16 gUnknown_0860F074[] = INCBIN_U16("graphics/interface/860F074.gbapal");
 
-static const u8 sTextSpeedFrameDelays[] = 
-{ 
-    [OPTIONS_TEXT_SPEED_SLOW] = 8, 
-    [OPTIONS_TEXT_SPEED_MID]  = 4, 
-    [OPTIONS_TEXT_SPEED_FAST] = 1 
+static const u8 sTextSpeedFrameDelays[] =
+{
+    [OPTIONS_TEXT_SPEED_SLOW] = 8,
+    [OPTIONS_TEXT_SPEED_MID]  = 4,
+    [OPTIONS_TEXT_SPEED_FAST] = 1
 };
 
 static const struct WindowTemplate sStandardTextBox_WindowTemplates[] =