[io grant] Document IO::Spec::*.path

Rakudo impl: rakudo/rakudo@0547979373
             rakudo/rakudo@8992af131b
             rakudo/rakudo@816b2d4bfa
Tests:       Raku/roast@7266522699
             Raku/roast@6ac3b4aabd
             Raku/roast@8e445f8576

Author: zoffixznet

doc/Type/IO/Spec/Unix.pod6

@@ -170,6 +170,20 @@ combining character on it:
     say IO::Spec::Unix.is-absolute: "/\x[308]foo"; # OUTPUT: «True␤»
     say IO::Spec::Unix.is-absolute: "bar";         # OUTPUT: «False␤»
 
+=head2 method path
+
+Defined as:
+
+    method path(--> Seq:D)
+
+Splits the value of C«%*ENV<PATH>» on colons (C<":">), replaces empty parts with
+C<".">, and returns a L<Seq> with each of the resultant parts. Returns
+an empty L<Seq> if C«%*ENV<PATH>» is not set or is an empty string.
+
+    %*ENV<PATH> = 'foo:bar/ber::foo:';
+    IO::Spec::Unix.path.perl.say;
+    # OUTPUT: «("foo", "bar/ber", ".", "foo", ".").Seq␤»
+
 =head2 method tmpdir
 
 Defined as:

doc/Type/IO/Spec/Win32.pod6

@@ -131,6 +131,20 @@ a volume:
     say IO::Spec::Win32.is-absolute: ｢C:\foo｣;      # OUTPUT: «True␤»
     say IO::Spec::Win32.is-absolute: "bar";         # OUTPUT: «False␤»
 
+=head2 method path
+
+Defined as:
+
+    method path(--> Seq:D)
+
+Splits the value of C«%*ENV<PATH>» (or C«%*ENV<Path>» if the former is not set)
+on semicolons (C<";">) and returns a L<Seq> with each of the resultant
+parts, always adding element C<"."> to the head. Removes all double
+quotes (C<">) it finds.
+
+    %*ENV<PATH> = 'foo;"bar"/"ber"';
+    IO::Spec::Win32.path.perl.say; # OUTPUT: «(".", "foo", "bar/ber").Seq␤»
+
 =head2 method tmpdir
 
 Defined as: