Fix indentation error from RST conversion

Author: AA-Turner

pep-0310.txt

@@ -238,12 +238,9 @@ could be mentioned here.
        https://mail.python.org/pipermail/python-dev/2003-August/037795.html
 
 .. [3] Thread on python-dev with subject
-
-.. [Python-Dev] pre-PEP: Resource-Release Support for Generators
-
-                starting at
-
-                https://mail.python.org/pipermail/python-dev/2003-August/037803.html
+       `[Python-Dev] pre-PEP: Resource-Release Support for Generators`
+       starting at
+       https://mail.python.org/pipermail/python-dev/2003-August/037803.html
 
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