Improve support for purging Haml even more

Author: adamwathan

__tests__/fixtures/purge-example.html

@@ -34,4 +34,6 @@
 .flow-root
   .text-green-700.bg-green-100
     .text-left= content
-    %samp= output
+    %samp.font-mono{:data-foo => "bar"}= output
+    .col-span-4[aria-hidden=true]
+    .tracking-tight#headline

__tests__/purgeUnusedStyles.test.js

@@ -54,6 +54,10 @@ function assertPurged(result) {
   expect(result.css).toContain('.text-green-700')
   expect(result.css).toContain('.bg-green-100')
   expect(result.css).toContain('.text-left')
+  expect(result.css).toContain('.font-mono')
+  expect(result.css).toContain('.col-span-4')
+  expect(result.css).toContain('.tracking-tight')
+  expect(result.css).toContain('.tracking-tight')
 }
 
 test('purges unused classes', () => {

src/lib/purgeUnusedStyles.js

@@ -67,7 +67,7 @@ export default function purgeUnusedUtilities(config) {
         const broadMatches = content.match(/[^<>"'`\s]*[^<>"'`\s:]/g) || []
 
         // Capture classes within other delimiters like .block(class="w-1/2") in Pug
-        const innerMatches = content.match(/[^<>"'`\s.()=%]*[^<>"'`\s.()=%:]/g) || []
+        const innerMatches = content.match(/[^<>"'`\s.(){}\[\]#=%]*[^<>"'`\s.(){}\[\]#=%:]/g) || []
 
         return broadMatches.concat(innerMatches)
       },