Fixed a few errors. Zoffix++, moritz++

doc/Language/functions.pod6

@@ -350,7 +350,7 @@ one sublist, or many:
 grab(flat (1, 2), (3, 4));   # OUTPUT: «grab 1␤grab 2␤grab 3␤grab 4␤»
 grab(flat $(1, 2), $(3, 4)); # OUTPUT: «grab 1 2␤grab 3 4␤»
 grab(flat (1, 2));           # OUTPUT: «grab 1␤grab 2␤»
-grab(flat $(1, 2));          # OUTPUT: «grab 1 2␤»
+grab(flat $(1, 2));          # OUTPUT: «grab 1␤grab 2␤»
 
 It is worth noting that mixing binding and sigilless variables
 in these cases requires a bit of finesse, because there is no Scalar
@@ -529,7 +529,7 @@ sub circumfix:<START END>(*@elems) {
     "start", @elems, "end"
 }
 
-say START 'a', 'b', 'c' END;        # OUTPUT: «start a b c end␤»
+say START 'a', 'b', 'c' END;        # OUTPUT: «(start [a b c] end)␤»
 =end code
 
 Postcircumfixes also receive the term after which they are parsed as
@@ -841,8 +841,8 @@ sub print-bar(Bar() $bar) {
 print-bar Foo.new;
 =end code
 
-Coercion types are supposed to work wherever types work, but Rakudo
-currently (2015.02) only implements them for subroutine parameters.
+Coercion types are supposed to work wherever types work, but Rakudo currently
+(2017.05) only implements them in signatures, for both parameters and return types.
 
 =head1 C<sub MAIN>
 X<|MAIN>X«|command line arguments»