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-rw-r--r--guides/source/action_mailer_basics.md2
1 files changed, 1 insertions, 1 deletions
diff --git a/guides/source/action_mailer_basics.md b/guides/source/action_mailer_basics.md
index 6562dc3a98..ba26c922be 100644
--- a/guides/source/action_mailer_basics.md
+++ b/guides/source/action_mailer_basics.md
@@ -560,7 +560,7 @@ Unlike controllers, the mailer instance doesn't have any context about the
incoming request so you'll need to provide the `:asset_host` parameter yourself.
As the `:asset_host` usually is consistent across the application you can
-configure it globally in config/application.rb:
+configure it globally in `config/application.rb`:
```ruby
config.action_mailer.asset_host = 'http://example.com'