minor #1282 fix typo (nicoder)

This PR was submitted for the master branch but it was merged into the 1.3 branch instead (closes #1282).

Discussion
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fix typo

Commits
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e9adcdf5 fix typo

doc/usage.rst

@@ -25,7 +25,7 @@ If you want more flexibility, use Composer_ instead:
 Web Server
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-All examples in the documentation relies on a well-configured web server; read
+All examples in the documentation rely on a well-configured web server; read
 the :doc:`webserver documentation<web_servers>` to check yours.
 
 Bootstrap