[perl #126836] [BUG] space in sub:name () {} needed if colon in name and has sig

[via RT]

# New Ticket Created by  Lloyd Fournier 
# Please include the string:  [perl #126836]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=126836 >


sub foo() {} #fine
sub foo:bar {} #fine
sub foo:bar() {} #LTA error
sub foo:bar () {} # fine