[issue21361] Add how to run a single test case to the devguide

[Jessica McKellar]

New submission from Jessica McKellar:

I had wanted to run a single TestCase, or single TestCase test method, and saw that how to do this wasn't in the devguide. Pattern-matching from the other rules doesn't work (for now, you have to use unittest instead of test), and asking on IRC, many people didn't know it was possible. :)

This patch adds documentation on how to run a single TestCase. I visually inspected the built HTML to confirm that it looks as desired.

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components: Devguide
files: devguide.diff
keywords: easy, needs review, patch
messages: 217239
nosy: ezio.melotti, jesstess
priority: normal
severity: normal
stage: patch review
status: open
title: Add how to run a single test case to the devguide
type: enhancement
Added file: http://bugs.python.org/file35048/devguide.diff

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21361>
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