Commits
-------
85ca8e3 ParameterBag no longer resolves parameters that have spaces.
99011ca Added tests for ParameterBag parameters with spaces
Discussion
----------
[DependencyInjection] Parameters with spaces are not resolved
Bug fix: yes
Feature addition: no
Backwards compatibility break: no (not likely, according to convention)
Symfony2 tests pass: yes
Fixes the following tickets: #2884
`ParameterBag` currently resolves anything between two `%` signs, which creates issues for any parameters in the DIC that are legitimate text. This PR enforces the [documented parameter convention](http://symfony.com/doc/2.0/book/service_container.html#service-parameters) so that only `%parameters.with.no_spaces%` are resolved.
I was considering using instead `^%([^\w\._-]+)%$`, but felt that was too constricting & could easily introduce issues with existing applications.