explain output infelicity in psql

I have just noticed while checking the EXPLAIN YAML patch that the 
non-text explain formats are output as a single line with embedded line 
feeds, while the text format is delivered as a set of text records, one 
per line. The practical effect of this is that psql decorates the 
non-text format output with continuation characters:
   andrew=# explain select count(*) from pg_class where relname ~ 'pg_';                              QUERY PLAN
                    ----------------------------------------------------------------    Aggregate  (cost=9.67..9.68
rows=1width=0)      ->  Seq Scan on pg_class  (cost=0.00..9.16 rows=204 width=0)            Filter: (relname ~
'pg_'::text)  (3 rows)
 
   Time: 5.813 ms   andrew=# explain (format yaml) select count(*) from pg_class where   relname ~ 'pg_';
  QUERY PLAN                  -----------------------------------------     - Plan:                               +
  Node Type: Aggregate               +        Strategy: Plain                    +        Startup Cost: 9.67
    +        Total Cost: 9.68                   +        Plan Rows: 1                       +        Plan Width: 0
               +        Plans:                             +          - Node Type: Seq Scan            +
ParentRelationship: Outer     +            Relation Name: pg_class        +            Alias: pg_class                +
          Startup Cost: 0.00             +            Total Cost: 9.16               +            Plan Rows: 204
        +            Plan Width: 0                  +            Filter: (relname ~ 'pg_'::text)   (1 row)
 

Those + chars at the end of the line are ugly, to say the least, and 
they make the supposedly machine-readable formats not so machine 
readable if anyone wanted to c&p the output into a parser. (I'm mildly 
surprised this hasn't been noticed before).

Maybe we need to teach psql not to do this formatting for EXPLAIN output?

cheers

andrew