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/scrcmd.c

@@ -459,7 +459,7 @@ bool8 ScrCmd_compare_var_to_var(struct ScriptContext *ctx)
     return FALSE;
 }
 
-// Note: addvar doesn't support adding from a variable in vanilla. If you were to 
+// Note: addvar doesn't support adding from a variable in vanilla. If you were to
 // add a VarGet() to the above, make sure you change the `addvar VAR_*, -1`
 // in the contest scripts to `subvar VAR_*, 1`, else contests will break.
 bool8 ScrCmd_addvar(struct ScriptContext *ctx)
@@ -649,7 +649,7 @@ bool8 ScrCmd_fadescreenswapbuffers(struct ScriptContext *ctx)
     switch (mode)
     {
         case FADE_TO_BLACK:
-        case FADE_TO_WHITE:   
+        case FADE_TO_WHITE:
         default:
             CpuCopy32(gPlttBufferUnfaded, gPaletteDecompressionBuffer, PLTT_DECOMP_BUFFER_SIZE);
             FadeScreen(mode, 0);