remove trailing ws

Author: coke

doc/Language/testing.pod6

@@ -185,11 +185,11 @@ with a valid C<plan> function when all tests are finalized. Use of C<plan> can h
 detect test failures otherwise not reported because tests were accidentally skipped
 due to bugs in the tests or bugs in the compiler.  For example:
 
-    sub do-stuff {@}; 
-    use Test; 
+    sub do-stuff {@};
+    use Test;
     ok .is-prime for do-stuff;
     done-testing;
-    
+
     # output:
     1..0
 
@@ -199,16 +199,16 @@ the test suite doesn't know how many tests were meant to be run, so it passes.
 
 Adding C<plan> gives a true picture of the test:
 
-    sub do-stuff {@}; 
+    sub do-stuff {@};
     use Test;
     plan 1;
     ok .is-prime for do-stuff;
-    
+
     # output:
     1..1
     # Looks like you planned 1 test, but ran 0
 
-Note that leaving the C<done-testing> in place will have no effect on the new test 
+Note that leaving the C<done-testing> in place will have no effect on the new test
 results, but it should be removed for clarity.
 
 =head1 Testing return values