ensure that destination directories don't exist before creating them
Fix link for StopwatchEvent class
[Book] make headlines consistent with our standards
[Reference] consistent headlines
[QuickTour] consistent headlines
document the default value of the form's compound option
add the action option and the method option to the introductionary table, remove doubled include of them
fix the order of the options in the table to match their order below
move versionadded directives for form options directly below the option's headline
minor #3773 modify Symfony CMF configuration values in the build process so that the... (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
----------

modify Symfony CMF configuration values in the build process so that the...

...y match the Symfony documentation

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Commits
-------

e78c7c4 modify Symfony CMF configuration values in the build process so that they match the Symfony documentation
minor #3772 [Cookbook][Sessions] some language improvements (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[Cookbook][Sessions] some language improvements

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Commits
-------

f4d40e7 [Cookbook][Sessions] some language improvements
Fixed variable naming
minor #3775 Fixed variable naming (peterrehm)

This PR was submitted for the 2.4 branch but it was merged into the 2.3 branch instead (closes #3775).

Discussion
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Fixed variable naming

Changed $app into $this since this is used in the other helpers as well and $app is not available inside a console command.

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

Commits
-------

66581a6 Fixed variable naming
bug #3768 the Locale component does not have elements tagged with @api (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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the Locale component does not have elements tagged with @api

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

As far as i can see, there is no element in the Locale component tagged with ``@api``.

Commits
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274d963 the Locale component does not have elements tagged with @api
minor #3767 [Book] link to the bc promise in the stable API description (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[Book] link to the bc promise in the stable API description

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Commits
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43761b7 [Book] link to the bc promise in the stable API description
minor #3766 [Book] add note about services and the service container in the form cha... (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[Book] add note about services and the service container in the form cha...

...pter

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Services and the service container were not explained when reading the form chapter. Thus, I thought it is worth mentioning how to learn more about them if people get confused with all the new terms.

Commits
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4afd8a4 [Book] add note about services and the service container in the form chapter
minor #3765 [WIP] make headlines consistent with our standards (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[WIP] make headlines consistent with our standards

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

- [x] Book
- [ ] Components
- [ ] Contributing
- [ ] Cookbook
- [x] Quick Tour
- [x] Reference

Commits
-------

1d2a620 [QuickTour] consistent headlines
d49d12e [Reference] consistent headlines
0702d1f [Book] make headlines consistent with our standards
bug #3761 buildViewBottomUp has been renamed to finishView (Nyholm)

This PR was merged into the 2.3 branch.

Discussion
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buildViewBottomUp has been renamed to finishView

Same PR as #3751

Commits
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d8f97e0 buildViewBottomUp has been renamed to finishView
Made code readable
Reworded article a bit