Add parser support for the math helper.

src/renderer/inline_partial_tree.rs

@@ -111,7 +111,8 @@ fn extract_inline_partials_from_tag<'a, 'b>(
         | DustTag::DTHelperLast(parameterized_block)
         | DustTag::DTHelperSelect(parameterized_block)
         | DustTag::DTHelperAny(parameterized_block)
-        | DustTag::DTHelperNone(parameterized_block) => {
+        | DustTag::DTHelperNone(parameterized_block)
+        | DustTag::DTHelperMath(parameterized_block) => {
             match &parameterized_block.contents {
                 None => (),
                 Some(body) => extract_inline_partials_from_body(blocks, &body),

src/renderer/renderer.rs

@@ -644,6 +644,7 @@ impl<'a> DustRenderer<'a> {
                 }
                 _ => return Ok("".to_owned()),
             },
+            DustTag::DTHelperMath(parameterized_block) => {}
         }
 
         Ok("".to_owned())