add closing marks that were missing

Author: szabgab

doc/Language/testing.pod6

@@ -176,14 +176,14 @@ C<done-testing>.
 
 You can also provide a C<:skip-all> named argument instead of a test count,
 to indicate that you want to skip all of the tests. Such a plan will
-call L«C<exit>|/routine/exit>, unless used inside of a C<subtest>.
+call L«C<exit>|/routine/exit>», unless used inside of a C<subtest>.
 
     plan :skip-all<These tests are only for Windows> unless $*DISTRO.is-win;
     plan 1;
     ok dir 'C:/'; # this won't get run on non-Windows
 
 If used in a C<subtest>, it will instead C<return> from that
-C<subtest>'s L«C<Callable>|/type/Callable>. For that reason, to be able to
+C<subtest>'s L«C<Callable>|/type/Callable>». For that reason, to be able to
 use C<:skip-all> inside a C<subtest>, you must use a C<sub> instead of a
 regular block: