Improve handling of files without extensions

[joemcgill]

In certain situations uploaded files can result in a blank filename. In those cases we should add a default filename.

[swissspidy]

Would this result in unnamed-file.jpg, unnamed-file-2.jpg, etc.?

[joemcgill]

Replying to swissspidy:

Would this result in unnamed-file.jpg, unnamed-file-2.jpg, etc.?

Good question. It will indeed since this function is called from within wp_unique_filename(), where incrementing duplicate file names is handled.

[joemcgill]

Fix typos

[joemcgill]

In 37809:

Media: Improve handling of extensionless filenames.

Merge of [37756] to the 4.5 branch.

See #37111.

[joemcgill]

In 37810:

Media: Improve handling of extensionless filenames.

Merge of [37756] to the 4.4 branch.

See #37111.

[joemcgill]

In 37814:

Media: Improve handling of extensionless filenames.

Merge of [37756] to the 4.3 branch.

See #37111.

[joemcgill]

In 37816:

Media: Improve handling of extensionless filenames.

Merge of [37756] to the 4.2 branch.

See #37111.

[joemcgill]

In 37818:

Media: Improve handling of extensionless filenames.

Merge of [37756] to the 4.1 branch.

See #37111.

[joemcgill]

In 37819:

Media: Improve handling of extensionless filenames.

Merge of [37756] to the 4.0 branch.

See #37111.

[joemcgill]

In 37822:

Media: Improve handling of extensionless filenames.

Merge of [37756] to the 3.9 branch.

See #37111.

[joemcgill]

In 37824:

Media: Improve handling of extensionless filenames.

Merge of [37756] to the 3.8 branch.

See #37111.

[joemcgill]

In 37825:

Media: Improve handling of extensionless filenames.

Merge of [37756] to the 3.7 branch.

See #37111.

[joemcgill]

Fixed in [37756]