Fix wrong identation for lists
Added a note about configuring several paths under the same namespace
Minor simplification of the XML code
Fixed the case of the headings
Added a comma
add versionadded for the data collector form extension
Fixed the section about getting services from a command
Fixing comment typo for Doctrine findBy and findOneBy code example
Update hostname_pattern.rst

Error in xml
minor #3872 Update hostname_pattern.rst (sofany)

This PR was submitted for the 2.4 branch but it was merged into the 2.3 branch instead (closes #3872).

Discussion
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Update hostname_pattern.rst

Error in xml

Commits
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1baf2db Update hostname_pattern.rst
Merge branch '2.3' into 2.4
[reference] [constraints] fixed outdated docs for the Collection constraint since Symfony 2.3.
Misc. minor fixes mostly related to formatting issues
Added the suggestions made by the great @WouterJ
Fixed the formating of one table (it now uses proper headers)
Linked the cookbook about DIC scopes
Bootstraped the standards for "Files and Directories"
Fixed some minor formatting issues related to lists
Fixed the formatting of one table headers
Removed a tip inside a sidebar

Adding a tip inside a short sidebar isn't very normal. Moreover
it doesn't look right on the website.