Refactor tests.

Refactor tests to use explicit testing assertions, rather than diff'ing
test output.  This makes the test code a bit shorter, more explicitly
encodes testing intent, and makes test failure diagnosis more
straightforward.

include/jemalloc/internal/chunk_dss.h

@@ -7,7 +7,7 @@ typedef enum {
 	dss_prec_secondary = 2,
 
 	dss_prec_limit     = 3
-} dss_prec_t ;
+} dss_prec_t;
 #define	DSS_PREC_DEFAULT	dss_prec_secondary
 #define	DSS_DEFAULT		"secondary"
 

include/jemalloc/internal/util.h

@@ -84,7 +84,7 @@
 /******************************************************************************/
 #ifdef JEMALLOC_H_EXTERNS
 
-int	buferror(char *buf, size_t buflen);
+int	buferror(int err, char *buf, size_t buflen);
 uintmax_t	malloc_strtoumax(const char *nptr, char **endptr, int base);
 void	malloc_write(const char *s);