sched/: Remove dangling space at the end of lines.

sched/pthread/pthread_mutextrylock.c

@@ -179,7 +179,7 @@ int pthread_mutex_trylock(FAR pthread_mutex_t *mutex)
               DEBUGASSERT(mutex->pid != 0); /* < 0: available, >0 owned, ==0 error */
               DEBUGASSERT((mutex->flags & _PTHREAD_MFLAGS_INCONSISTENT) != 0);
 
-              /* A thread holds the mutex, but there is no such thread. 
+              /* A thread holds the mutex, but there is no such thread.
                * POSIX requires that the 'robust' mutex return EOWNERDEAD
                * in this case. It is then the caller's responsibility to
                * call pthread_mutx_consistent() fo fix the mutex.

sched/sched/sched_setaffinity.c

@@ -159,5 +159,5 @@ errout_with_csection:
 errout_with_lock:
   sched_unlock();
   set_errno(errcode);
-  return ERROR;  
+  return ERROR;
 }

sched/wqueue/kwork_inherit.c

@@ -154,7 +154,7 @@ static void lpwork_boostworker(pid_t wpid, uint8_t reqprio)
 
   if (reqprio > wtcb->sched_priority)
     {
-      /* Raise the priority of the worker thread.  This cannot cause 
+      /* Raise the priority of the worker thread.  This cannot cause
        * context switch because we have preemption disabled.  The task
        * will be marked "pending" and the switch will occur during
        * sched_unlock() processing.