Fix trailing whitespaces in C files. (python#4130)

Author: serhiy-storchaka

Include/pystate.h

@@ -125,8 +125,8 @@ typedef struct _ts PyThreadState;
 #else
 
 typedef struct _err_stackitem {
-    /* This struct represents an entry on the exception stack, which is a 
-     * per-coroutine state. (Coroutine in the computer science sense, 
+    /* This struct represents an entry on the exception stack, which is a
+     * per-coroutine state. (Coroutine in the computer science sense,
      * including the thread and generators).
      * This ensures that the exception state is not impacted by "yields"
      * from an except handler.

Include/pytime.h

@@ -30,14 +30,14 @@ typedef enum {
     /* Round to nearest with ties going to nearest even integer.
        For example, used to round from a Python float. */
     _PyTime_ROUND_HALF_EVEN=2,
-    /* Round away from zero 
+    /* Round away from zero
        For example, used for timeout. _PyTime_ROUND_CEILING rounds
        -1e-9 to 0 milliseconds which causes bpo-31786 issue.
        _PyTime_ROUND_UP rounds -1e-9 to -1 millisecond which keeps
        the timeout sign as expected. select.poll(timeout) must block
        for negative values." */
     _PyTime_ROUND_UP=3,
-    /* _PyTime_ROUND_TIMEOUT (an alias for _PyTime_ROUND_UP) should be 
+    /* _PyTime_ROUND_TIMEOUT (an alias for _PyTime_ROUND_UP) should be
        used for timeouts. */
     _PyTime_ROUND_TIMEOUT = _PyTime_ROUND_UP
 } _PyTime_round_t;

Modules/overlapped.c

@@ -804,7 +804,7 @@ do_WSARecv(OverlappedObject *self, HANDLE handle,
     WSABUF wsabuf;
     int ret;
     DWORD err;
-    
+
     wsabuf.buf = bufstart;
     wsabuf.len = buflen;
 

Python/pystate.c

@@ -450,7 +450,7 @@ PyThreadState_Clear(PyThreadState *tstate)
     Py_CLEAR(tstate->exc_state.exc_type);
     Py_CLEAR(tstate->exc_state.exc_value);
     Py_CLEAR(tstate->exc_state.exc_traceback);
-    
+
     /* The stack of exception states should contain just this thread. */
     assert(tstate->exc_info->previous_item == NULL);
     if (Py_VerboseFlag && tstate->exc_info != &tstate->exc_state) {