[SR-9605] Date formatter grammar mistake

[swift-ci]

Previous ID	SR-9605
Radar	None
Original Reporter	royalaaaaa (JIRA User)
Type	Bug

Environment

Swift 4.2

macOS, iOS (haven't tested it on tvOS but i'm pretty sure that it's also qualifying)

Additional Detail from JIRA

Votes	0
Component/s	Foundation
Labels	Bug
Assignee	None
Priority	Medium

md5: d80bfb31bbcc9308f8b2835bdac5537e

Issue Description:

In Polish language this example have one minor grammar mistake:

let dateFormatter = DateFormatter()
dateFormatter.setLocalizedDateFormatFromTemplate("MMMMy")
let date = dateFormatter.string(from: Date())
 
print(date)

date variable outputs "styczeń 2019" (on 6th of January 2019) when it should capitalize first letter of month (as in "Styczeń 2019"). I couldn't find any format template that capitalizes it and i had to do it manually (by creating an extension to String). It is not critical or anything, but it's definitely not correct.

[spevans]

The month names that Foundation uses come from libICU and ultimately the CLDR (
Unicode Common Locale Data Repository) so cant easily be fixed in Foundation. This ICU bug (https://unicode-org.atlassian.net/browse/ICU-8893) may give further insight, especially the last comment.