fixed bug with blank line handling within list items

block.go

@@ -1079,10 +1079,16 @@ gatherlines:
 			*flags |= LIST_ITEM_CONTAINS_BLOCK
 		}
 
-		containsBlankLine = false
+		// if this line was preceeded by one or more blanks,
+		// re-introduce the blank into the buffer
+		if containsBlankLine {
+			containsBlankLine = false
+			raw.WriteByte('\n')
+		}
 
 		// add the line into the working buffer without prefix
 		raw.Write(data[line+indent : i])
+
 		line = i
 	}
 

block_test.go

@@ -396,6 +396,9 @@ func TestUnorderedList(t *testing.T) {
 
 		"* List\n\n          code block with spaces\n",
 		"<ul>\n<li><p>List</p>\n\n<pre><code>  code block with spaces\n</code></pre></li>\n</ul>\n",
+
+		"* List\n\n    * sublist\n\n    normal text\n\n    * another sublist\n",
+		"<ul>\n<li><p>List</p>\n\n<ul>\n<li>sublist</li>\n</ul>\n\n<p>normal text</p>\n\n<ul>\n<li>another sublist</li>\n</ul></li>\n</ul>\n",
 	}
 	doTestsBlock(t, tests, 0)
 }