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/apprentice.c

@@ -48,7 +48,7 @@
  * - Asking which move a mon should use, which they will ask at most 5 times
  * - Asking what held item to give to a mon, which they will ask at most 3 times (once for each mon)
  * - Asking what they should say when they win a battle, which will always be their final question before departing
- * 
+ *
  * ## After departing
  * After telling them what they should say when they win a battle they will leave the lobby for a final time
  * They will then be replaced by a new random Apprentice (they can repeat)
@@ -274,7 +274,7 @@ static void SetRandomQuestionData(void)
 
     for (i = 0; i < ARRAY_COUNT(questionOrder); i++)
         questionOrder[i] = sQuestionPossibilities[i];
-    
+
     // Shuffle the questions an arbitrary 50 times
     for (i = 0; i < 50; i++)
     {
@@ -788,7 +788,7 @@ static void GetNumApprenticePartyMonsAssigned(void)
 static void IsFinalQuestion(void)
 {
     s32 questionNum = CURRENT_QUESTION_NUM;
-    
+
     if (questionNum < 0)
     {
         // Not finished asking initial questions
@@ -941,7 +941,7 @@ static void ApprenticeGetQuestion(void)
             gSpecialVar_Result = APPRENTICE_QUESTION_WHICH_FIRST;
             break;
         default:
-      //case QUESTION_ID_WIN_SPEECH:  
+      //case QUESTION_ID_WIN_SPEECH:
             gSpecialVar_Result = APPRENTICE_QUESTION_WIN_SPEECH;
             break;
         }
@@ -1107,7 +1107,7 @@ static void TrySetApprenticeHeldItem(void)
 
     if (PLAYER_APPRENTICE.questionsAnswered < NUM_WHICH_MON_QUESTIONS)
         return;
-    
+
     count = 0;
     for (j = 0; j < APPRENTICE_MAX_QUESTIONS; j++)
     {