Document order of operations in qqw and qqww

doc/Language/quoting.pod6

@@ -165,6 +165,12 @@ you need to use the C<qqw> variant:
     my @list = qqw{$a b c};
     say @list;                # 42 b c
 
+Note that variable interpolation happens before word splitting:
+
+    my $a = "a b";
+    my @list = qqw{$a c};
+    .say for @list; # says "a", says "b", then says "c"
+
 =head2 X<<<Word quoting with interpolation and quote protection: qqww|quote,qqww;quote,<< >>;quote,« »>>>
 
 The C<qqw> form of word quoting will treat quote characters literally, leaving them in the
@@ -182,6 +188,14 @@ or equivalently:
     my $a = 42; say <<"$a b" c>>.perl; # ("42 b", "c")
     my $a = 42; say «"$a b" c».perl; # ("42 b", "c")
 
+Quote protection happens before interpolation, and interpolation happens before word splitting,
+so quotes coming from inside interpolated variables are just literal quote characters:
+
+    my $a = "1 2";
+    say qqww{"$a" $a}.perl; # ("1 2", "1", "2")
+    my $b = "1 \"2 3\"";
+    say qqww{"$b" $b}.perl; # ("1 \"2 3\"", "1", "\"2", "3\"")
+
 =head2 X<Shell quoting: qx|quote,qx>
 
 To run a string as an external program, not only is it possible to pass the