[PATCH testsuite] Clean-up gdb.ada test names

[Tom de Vries]

On 08-05-2020 21:00, Keith Seitz via Gdb-patches wrote:
> -gdb_test "print s'last"  " = 3"
> +    gdb_test "print s'last"  " = 3Z

Hi Keith,

Missing double quote at eol (instead, we have "Z").

This causes:
...
ERROR: tcl error sourcing
/data/gdb_versions/devel/src/gdb/testsuite/gdb.ada/attr_ref_and_charlit.exp.
ERROR: extra characters after close-quote
    while executing
"gdb_test "print s'last"  " = 3Z
    gdb_test "p"
    ("uplevel" body line 3)
    invoked from within
"uplevel 1 $body"
    invoked from within
"with_test_prefix "run" {
    gdb_test "print s'first" " = 2"
    gdb_test "print s'last"  " = 3Z
    gdb_test "print s(s'first) = 'a'" " = true"
    g..."
    (file
"/data/gdb_versions/devel/src/gdb/testsuite/gdb.ada/attr_ref_and_charlit.exp"
line 32)
    invoked from within
"source
/data/gdb_versions/devel/src/gdb/testsuite/gdb.ada/attr_ref_and_charlit.exp"
    ("uplevel" body line 1)
    invoked from within
"uplevel #0 source
/data/gdb_versions/devel/src/gdb/testsuite/gdb.ada/attr_ref_and_charlit.exp"
    invoked from within
"catch "uplevel #0 source $test_file_name""
...

Thanks,
- Tom