fixed XML examples
fixing commands in the reverse engineering example
Clarified how to load translations from db

Added link the the translation loader tag documentation.
Removed trailing whitespace.
Change 'translation loader tag' to 'translation.loader tag'
Switched regular link to doc reference
Small typo

Fixed small typo (extra "`")
markup fix
Fixed typo in UglifyCss usage example
make coding standards example match the Symfony2 codebase conventions
Documented all parameter types
Merge pull request #2866 from WouterJ/book_fix_xml

Fixed XML examples
[#2866] Minor fixes thanks to @stof and @WouterJ
fix underline to match the title's length
Merge pull request #2873 from xabbuh/issue-2868

fixing commands in the reverse engineering example
Added note on untrimmed parameters (XML)

In XML configuration, the value between` parameter` tags isn't trimmed,
which can lead to unexpected behavior.

See https://github.com/symfony/symfony/pull/8661
Update definition.rst - indentation fix

Reverting indentation of a call to "ifString()" back to its correct place.

A commit from 9 months ago changed it by mistake:
https://github.com/symfony/symfony-docs/commit/9a0b4e1edfd61062fcb8181fc0c58a94676579b2#L0L380
Merge pull request #2881 from Epskampie/patch-1

Clarified how to load translations from db
Merge pull request #2882 from WouterJ/parameter_types

Documented all parameter types
[#2882] Minor tweaks and additional information added