[perl #73806] if() not parsed as sub call; should do, and emit a warning

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# New Ticket Created by  Moritz Lenz 
# Please include the string:  [perl #73806]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=73806 >


10:15 <@moritz_> rakudo: my @b= 5, 1, 2; if(@b>2) {say 'yes';}
10:15 <+p6eval> rakudo db0f85: OUTPUT«yes␤»
10:15 <@moritz_> WOAH THERE
10:16 <@moritz_> std: my @b= 5, 1, 2; if(@b>2) {say 'yes';}
10:16 <+p6eval> std 30196: OUTPUT«===SORRY!===␤if() interpreted as function
                call at line 1; please use whitespace instead of
                parens␤Unexpected block in infix position (two terms in
a row)
10:15 < cat> moiat /tmp/k2Uj3vzit0 line 1:␤------> my @b= 5, 1, 2; if(@b>2)
                ⏏{say 'yes';}

Rakudo should follow STD here.