add empties

Author: abrudz

docs/2013/6.md

@@ -39,7 +39,7 @@ highest values) of a numeric array.
 <a href="https://github.com/abrudz/apl_quest/blob/main/2013/6.apl" target="_blank" class="md-button md-button--primary right">Code on GitHub</a>
 
 <script>
-    testCases={"a":["19 ¯3 7.6 22","101","¯5+⍳10","?5⍴50","2 3⍴10 20 30 40 50 60","5 5⍴?25⍴100"],"b":["0","⌽19 ¯3 7.6 22","3.1415","10⍴0","14.2 9 ¯3 3.1 0 ¯1.1"],"f":"{{(⊃⌽⍵)-⊃⍵}(,⍵)[⍋,⍵]}"}
+    testCases={"a":["19 ¯3 7.6 22","101","¯5+⍳10","?5⍴50","2 3⍴10 20 30 40 50 60","5 5⍴?25⍴100"],"b":["0","⌽19 ¯3 7.6 22","3.1415","10⍴0","14.2 9 ¯3 3.1 0 ¯1.1","⍬","3 0⍴0","0 0 2⍴0"],"f":"{{(⊃⌽⍵)-⊃⍵}(,⍵)[⍋,⍵]}"}
     p_Input.value=localStorage.getItem(window.location.pathname)
     play=e=>e.outerHTML=`<iframe class="md-header--shadow" src="https://www.youtube.com/embed/36HlHsEjUIQ?list=PLYKQVqyrAEj9wDIUyLDGtDAFTKY38BUMN&autoplay=1" title="<span class=s>2013-</span>6: Home On The Range (APL Quest 2013-6)" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>`
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