[libc++] NFC: Normalize `#endif //` comment indentation

GitOrigin-RevId: 4cd6ca102a94e1b64ba3f940cc26b4d7b2b82964
diff --git a/src/ios.cpp b/src/ios.cpp
index 7e4d061..a8a9901 100644
--- a/src/ios.cpp
+++ b/src/ios.cpp
@@ -43,7 +43,7 @@
     if (ev != static_cast<int>(io_errc::stream)
 #ifdef _LIBCPP_ELAST
         && ev <= _LIBCPP_ELAST
-#endif  // _LIBCPP_ELAST
+#endif // _LIBCPP_ELAST
         )
         return __do_message::message(ev);
     return string("unspecified iostream_category error");
@@ -416,7 +416,7 @@
 #ifndef _LIBCPP_NO_EXCEPTIONS
     if (__exceptions_ & badbit)
         throw;
-#endif  // _LIBCPP_NO_EXCEPTIONS
+#endif // _LIBCPP_NO_EXCEPTIONS
 }
 
 void
@@ -426,7 +426,7 @@
 #ifndef _LIBCPP_NO_EXCEPTIONS
     if (__exceptions_ & failbit)
         throw;
-#endif  // _LIBCPP_NO_EXCEPTIONS
+#endif // _LIBCPP_NO_EXCEPTIONS
 }
 
 bool