-/* assert.h 4.1 83/05/03 */
+/* assert.h 4.2 85/01/21 */
# ifndef NDEBUG
-# define _assert(ex) {if (!(ex)){fprintf(stderr,"Assertion failed: file %s, line %d\n", __FILE__, __LINE__);exit(1);}}
-# define assert(ex) {if (!(ex)){fprintf(stderr,"Assertion failed: file %s, line %d\n", __FILE__, __LINE__);exit(1);}}
+# define _assert(ex) {if (!(ex)){fprintf(stderr,"Assertion failed: file \"%s\", line %d\n", __FILE__, __LINE__);exit(1);}}
+# define assert(ex) _assert(ex)
# else
-# define _assert(ex) ;
-# define assert(ex) ;
+# define _assert(ex)
+# define assert(ex)
# endif