change Proc#to_s format ('@...' -> ' ...') (#2362)

Now Proc#to_s returns
"#<Proc:0x00000237a0f5f170@t.rb:1>".
However, it is convenient to select a file name by (double-)clicking
on some terminals by separating ' ' instead of '@' like
"#<Proc:0x00000237a0f5f170 t.rb:1>"
[Feature #16101]

1 files changed, 1 insertions, 1 deletions

diff --git a/proc.c b/proc.c
index 5957cc3c7b..f03d8683b6 100644
--- a/proc.c
+++ b/proc.c
@@ -1310,7 +1310,7 @@ rb_block_to_s(VALUE self, const struct rb_block *block, const char *additional_i
       case block_type_iseq:
 	{
 	    const rb_iseq_t *iseq = rb_iseq_check(block->as.captured.code.iseq);
-	    rb_str_catf(str, "%p@%"PRIsVALUE":%d", (void *)self,
+	    rb_str_catf(str, "%p %"PRIsVALUE":%d", (void *)self,
 			rb_iseq_path(iseq),
 			FIX2INT(iseq->body->location.first_lineno));
 	}