Add a test showing that list indentation is flexible already

Closes #5.

README.md

@@ -61,7 +61,7 @@ Ecmarkdown also allows HTML comments anywhere that does not otherwise disturb th
 
 Lists are written as a series of lines, each starting with a number, e.g. `1.`. The first list item's number determines the starting number in the output (via `<ol start="x">`); subsequent list items' numbers are ignored.
 
-Lists can be nested using multiples of exactly two spaces.
+Lists can be nested. To do so, use any number of spaces to indent; as long as the number of spaces is consistent, list items will stay together in a nested list.
 
 ## Inline Formatting
 

test/list-cases/flexible-indent-nested-list.ecmarkdown

@@ -0,0 +1,11 @@
+1. Item 1
+    1. Item 1a
+    1. Item 1b
+1. Item 2
+   1. Item 2a
+1. Item 3
+1. Item 4
+     1. Item 4a
+      1. Item 4ai
+      1. Item 4aii
+     1. Item 4b

test/list-cases/flexible-indent-nested-list.html

@@ -0,0 +1,25 @@
+<ol>
+  <li>Item 1
+    <ol>
+      <li>Item 1a</li>
+      <li>Item 1b</li>
+    </ol>
+  </li>
+  <li>Item 2
+    <ol>
+      <li>Item 2a</li>
+    </ol>
+  </li>
+  <li>Item 3</li>
+  <li>Item 4
+    <ol>
+      <li>Item 4a
+        <ol>
+          <li>Item 4ai</li>
+          <li>Item 4aii</li>
+        </ol>
+      </li>
+      <li>Item 4b</li>
+    </ol>
+  </li>
+</ol>