Add a test

tests/queries/0_stateless/01599_multiline_input_and_singleline_comments.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/expect -f
+
+log_user 0
+set timeout 5
+match_max 100000
+
+if ![info exists env(CLICKHOUSE_PORT_TCP)] {set env(CLICKHOUSE_PORT_TCP) 9000}
+
+spawn clickhouse-client --multiline --port "$env(CLICKHOUSE_PORT_TCP)"
+expect ":) "
+
+# Make a query
+send -- "SELECT 1\r"
+expect ":-] "
+send -- "-- xxx\r"
+expect ":-] "
+send -- ", 2\r"
+expect ":-] "
+send -- ";\r"
+
+expect "│ 1 │ 2 │"
+expect ":) "
+
+send -- "\4"
+expect eof