* pr/15754:
  Polish contribution
  Polish SessionConfigurationImportSelector.selectImports()

Closes gh-15754

See gh-15754

* pr/15798:
  Polish "Inject Map directly rather than via ObjectProvider"
  Inject Map directly rather than via ObjectProvider

Closes gh-15798

See gh-15798

* pr/15778:
  Polish "Handle AccessControlException in JspTemplateAvailabilityProvider"
  Handle AccessControlException in JspTemplateAvailabilityProvider

Closes gh-15778

See gh-15778

* gh-15782:
  Optimize ConfigurationPropertyName

Closes gh-15782

This commit changes the iteration order when checking for element
equality. This is based on the educated guess that child elements
will likely differ while parents will probably be the same.

E.g. comparing "spring.banner.charset" with "spring.banner.location"
will now first check "charset" against "location" and thus saves some
cycles for elements that will be the same.

See gh-15782

* gh-15779:
  Polish "Optimize BeanPropertyName.toDashedForm()"
  Optimize BeanPropertyName.toDashedForm()

Closes gh-15779

See gh-15779

See gh-15779

Closes gh-15760

Previously, when ConfigurationPropertyName was building the String
returned from toString() it would use a StringBuilder with the
default initial capacity of 16. For properties with several
elements this was likely to be too small resulting in the builder's
buffer being resized.

This commit sizes the StringBuilder as a multiple of the number of
elements in the name, attempting to strike a balance between
allocating a StringBuilder with an initial capacity that's too
large and wastes memory and an initial capacity that's too small
and requires resizing.

See gh-15760

Previously, the ElementsParser would be created using its default
capacity of 6 even when parsing a String that is expected to
produce a single element.

This commit updates ConfigurationPropertyName to create an
ElementsParser with a capacity of 1 when parsing a String that should
contain only a single element.

See gh-15760

Previously, ElementsParser would expand its internal storage when the
size of the storage was <= the end index of the element being parsed,
irrespective of how many elements had been stored. This led to
expansion of the storage, even for a source that contains a single
element, if the end of the element was at an index greater than the
size of the storage.

This commit updates ElementsParser to resize its storage when the size
(the number of elements that have been stored) is equal to the size of
the storage.

See gh-15760

See gh-15760

* pr/15793:
  Use Assertions.contentOf() where possible

Closes gh-15793

* pr/15748:
  Polish "Alias auto-configured `TaskExecutor` to make async tasks use it"
  Alias auto-configured `TaskExecutor` to make async tasks use it

Closes gh-15748

See gh-15748

* pr/15784:
  Remove duplicate code from HealthWebEndpointResponseMapper

Closes gh-15784

* gh-15709:
  Polish "Always fail fast when SSL is enabled without a key store"
  Always fail fast when SSL is enabled without a key store

Closes gh-15709

See gh-15709

* gh-15752:
  Polish "Fix typos in JsonContentAssert failure messages"
  Fix typos in JsonContentAssert failure messages

See gh-15752

Closes gh-15752

Closes gh-15750

Closes gh-15712