Added a note about customizing a form with more than one template
Minor formatting improvement
Fixed minor formatting issue
Removed the old syntax and left just the "with" keyword syntax
Fixed a minor error
Fixed a minor grammar mistake
feature #3875 Added a note about customizing a form with more than one template (javiereguiluz)

This PR was merged into the 2.3 branch.

Discussion
----------

Added a note about customizing a form with more than one template

| Q             | A
| ------------- | ---
| Doc fix?      | no
| New docs?     | yes
| Applies to    | 2.3+
| Fixed tickets | #3643

Commits
-------

ce14104 Fixed a minor grammar mistake
1b386ff Fixed a minor error
08d26ee Removed the old syntax and left just the "with" keyword syntax
94625c5 Fixed minor formatting issue
6621720 Minor formatting improvement
2b0213b Added a note about customizing a form with more than one template