Extraneous newline emitted between error messages in GCC 6

[Patrick Palka]

GCC 6, compared to GCC 5, now emits an extra newline between error
messages.  Is this intended?

$ cat error.c
int x = a;
int y = b;
$ gcc-5 error.c
error.c:1:9: error: ‘a’ undeclared here (not in a function)
 int x = a;
         ^
error.c:2:9: error: ‘b’ undeclared here (not in a function)
 int y = b;
         ^
$ gcc-6 error.c
error.c:1:9: error: ‘a’ undeclared here (not in a function)
 int x = a;
         ^

error.c:2:9: error: ‘b’ undeclared here (not in a function)
 int y = b;
         ^

$