add note on service parameters regarding ScopeWideningInjectionException
fix backticks with double backticks
remove unnecessary text
change note to caution and simplify text
[#2415] Proofreading great new empty_data document and expanding some of the examples
Merge branch 'issue_1707' of github.com:joelclermont/symfony-docs into joelclermont-issue_1707

Conflicts:
	book/service_container.rst