Try to clarify what "any number of arguments" means in the "function …

…capture" page

Closes #53

src/content/chapter1_functions/lesson05_function_captures/en.html

@@ -6,7 +6,7 @@
 <p>
   The anonymous function <code>fn(a) { some_function(..., a, ...) }</code> can
   be written as <code>some_function(..., _, ...)</code>, with any number of
-  other arguments passed to the inner function. The underscore <code>_</code> is
-  a placeholder for the argument, equivalent to <code>a</code> in 
-  <code>fn(a) { some_function(..., a, ...) }</code>.
+  other arguments passed directly to the inner function. The underscore
+  <code>_</code> is a placeholder for the argument, equivalent to
+  <code>a</code> in <code>fn(a) { some_function(..., a, ...) }</code>.
 </p>