Link to macrotest crate

Closes #28.

README.md

@@ -300,11 +300,6 @@ Macro for easily using local extension traits<br>
 <a href="https://github.com/dtolnay/request-for-implementation/issues/43">[Design]</a>
 </td></tr></table>
 
-<table><tr><td><ul><li></li></ul></td><td>
-Testing tool for comparing output of macro against expected source code<br>
-<a href="https://github.com/dtolnay/request-for-implementation/issues/28">[Design]</a>
-</td></tr></table>
-
 <table><tr><td><ul><li></li></ul></td><td>
 Library + tool to list all source files of a crate<br>
 <a href="https://github.com/dtolnay/request-for-implementation/issues/38">[Design]</a>
@@ -383,6 +378,15 @@ Library to serialize and deserialize Syn syntax trees<br>
 </td></tr></table>
 </blockquote>
 
+<blockquote>
+<table><tr><td><ul><li></li></ul></td><td>
+Testing tool for comparing output of macro against expected source code<br>
+<a href="https://github.com/dtolnay/request-for-implementation/issues/28">[Design]</a>
+—
+<a href="https://github.com/eupn/macrotest">[Outcome]</a>
+</td></tr></table>
+</blockquote>
+
 <br>
 
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