_config.yml: disable compress_html in production

The HTML compressor strips <pre> opening tags from raw HTML code
blocks, breaking the formatting on the Example page.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

Author: troglobit

_config.yml

@@ -207,7 +207,7 @@ compress_html:
   profile: false
   blanklines: false
   ignore:
-    envs: [development]
+    envs: [development, production]
 
 exclude:
   - "*.gem"