Cygwin: fix formatting: drop trailing whitespace

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/include/cygwin/acl.h

@@ -25,7 +25,7 @@ extern "C" {
 
 /* Windows ACLs have a maximum size of 64K.  Counting the most pessimistic way,
    the maximum number of ACEs is 3276.  Technet claims "approximately 1820",
-   which uses the length of normal user and group SIDs for the computation. 
+   which uses the length of normal user and group SIDs for the computation.
    We're now going with 2730, the number of aclent_t entries matching a 32K
    buffer.
    On one hand, there are only a limited number of SIDs shorter than the normal

winsup/cygwin/include/cygwin/signal.h

@@ -246,7 +246,7 @@ typedef struct
 					   signals */
     /* Cygwin internal fields */
 #ifdef __INSIDE_CYGWIN__
-    __extension__ struct 
+    __extension__ struct
     {
       __uint32_t __pad2[__SI_CYG_PAD];	/* Locate at end of struct */
       void *si_cyg;			/* pointer to block containing

winsup/cygwin/include/machine/_arc4random.h

@@ -25,4 +25,4 @@ extern int __isthreaded;
 	    __lock_release (_arc4random_mutex);	\
         } while (0)
 
-#endif /* _MACHINE_ARC4RANDOM_H */ 
+#endif /* _MACHINE_ARC4RANDOM_H */