[PATCH][gdb/testsuite] Fix control-flow in gdb.reverse/insn-reverse.exp

[Tom Tromey]

>>>>> "Tom" == Tom de Vries <tdevries@suse.de> writes:

Tom> 2020-11-30  Tom de Vries  <tdevries@suse.de>

Tom> 	* gdb.reverse/insn-reverse.exp: Don't break inside gdb_test_multiple
Tom> 	clause.

Thanks, this seems reasonable to me.

Tom> +	    if [expr {$insn_addr == ""}] {

This is pre-existing, but it's weird to write [expr] here, because "if"
implicitly does that anyway.

Tom