updated readme

README.md

@@ -3,7 +3,7 @@
 Simple tool for sending email with sendmail, postfix or ssmtpd.
 
 Example:
-{{{
+```python
 import pysema
 
 pysema.send(
@@ -11,13 +11,13 @@ Example:
     'really good subject line',
     'Message body goes here'
     )
-}}}
+```
 
 If you need to send some complex message, use [email.message][em] from the 
 Python standard library to construct the message (including header fields) and 
 pass it to the `send_message` function:
 
-{{{
+```python
 import pysema
 from email.message import EmailMessage
 
@@ -25,7 +25,7 @@ pass it to the `send_message` function:
 # compose message
 
 pysema.send_message(msg)
-}}}
+```
 
 if something goes whoopsie a `pysema.SendMailException` is raised.