[PATCH] test: Ignore subtly different behaviour of the musl libc

[Tomi Ollila]

On Tue, Feb 26 2019, Luis Ressel wrote:
...
> --- a/test/T650-regexp-query.sh
> +++ b/test/T650-regexp-query.sh
> @@ -137,10 +137,10 @@ EOF
>  test_expect_equal_file EXPECTED OUTPUT
>  
>  test_begin_subtest "regexp error reporting"
> -notmuch search 'from:/unbalanced[/' 1>OUTPUT 2>&1
> +notmuch search 'from:/unbalanced[/' 2>&1 | sed -e 's/^\(A Xapian[^:]*:\).*/\1/' > OUTPUT

Simpler sed:  sed '/A Xapian/ s/:.*/:/'

>  cat <<EOF > EXPECTED
>  notmuch search: A Xapian exception occurred
> -A Xapian exception occurred parsing query: Invalid regular expression
> +A Xapian exception occurred parsing query:
>  Query string was: from:/unbalanced[/
>  EOF
>  test_expect_equal_file EXPECTED OUTPUT