Refactoring / code cleanup.

See:

* https://en.wikipedia.org/wiki/Code_refactoring

* https://www.refactoring.com/

* https://www.joelonsoftware.com/2002/01/23/rub-a-dub-dub/

Some small optimisations may have slipped in as well.

fc-solve/site/wml/src/1/index.html.tt2

@@ -17,20 +17,16 @@ string to indices test. <span class="enable_js">Please enable
 
 [%- WRAPPER wrap_html -%]
 
-[%- BLOCK moved__emscripten_common -%]
-[% INCLUDE emscripten_common__header %]
+[% INCLUDE emscripten_common__header subject = "string to indices test" %]
 <script>
 [% INCLUDE set_up_requirejs %]
-    [% incs %] {
+require(["s2i-test"], function (t) {
     window.my_web_fc_solve_ui = web_fc_solve_ui;
     web_fc_solve_ui.init_module((module_wrapper)=>{
     web_fc_solve_ui.set_up(module_wrapper);
     $(window._set_up_tabs);
     });
 });
 </script>
-[% END %]
-
-[% INCLUDE moved__emscripten_common incs = "require([\"s2i-test\"], function (t)" , subject = "string to indices test" , %]
 
 [% END %]