Show definition for type defs

As in the previous commit, we have to use the selector "pre.typedef"
instead of ".docblock.type-decl" to select the definition for type defs.

CHANGELOG.md

@@ -12,7 +12,7 @@ SPDX-License-Identifier: MIT
 - Improve the documentation parser:
   - Fix the definition of methods to only contain the actual definition.
   - Remove spurious members in module documentation.
-  - Show the definition for constants.
+  - Show the definition for constants and typedefs.
 
 ## v0.1.2 (2020-07-25)
 

src/parser.rs

@@ -132,6 +132,7 @@ pub fn parse_item_doc(item: &doc::Item) -> anyhow::Result<doc::Doc> {
     let definition_selector = match item.ty {
         doc::ItemType::Constant => "pre.const",
         doc::ItemType::Function => "pre.fn",
+        doc::ItemType::Typedef => "pre.typedef",
         _ => ".docblock.type-decl",
     };
     let definition = select_first(&document, definition_selector)?;