Additional German translations

[idpaterson]

@ckoeberle provided the following regarding the translation of a few words that were not yet translated in the German locale. Some are not direct translations, but I will try to integrate any of these that work with existing parsedatetime logic.

English	German	Example (english)	Example (german)
from	in ab	two days from now	in zwei Tagen ab heute
after	nach	the day after my birthday	einen Tag nachmeinem Geburtstag
before	vor	one week before my birthday	eine Woche vor meinem Geburtstag
prev	vorher	the prev day	einen Tag vorher eine Woche vorher
end of	Ende des Ende der	remind me at the end of the month remind me at the end of the week	erinnere mich Ende des Monats erinnere mich Ende der Woche
eod eom eoy	there is no corresponding german abbreviation
a an	same as one einem, einer	in a month in an hour	in einem Monat in einer Stunde

Numbers 0 to 20

Number	spelled
0	null
1	eins
2	zwei
3	drei
4	vier
5	fünf
6	sechs
7	sieben
8	acht
9	neun
10	zehn
11	elf
12	zwölf
13	dreizehn
14	vierzehn
15	fünfzehn
16	sechzehn
17	siebzehn
18	achtzehn
19	neunzehn
20	zwanzig

(original discussion)

[bear]

having more language coverage is always a huge win - thanks @idpaterson

[idpaterson]

A quick update on this: I had implemented the changes described above a few months ago but many issues arose when applying the examples as test cases (previously German tests covered only numeric datetime formats). I have not proceeded but this is still of interest to me. Will have more time available in a few months to rebase and take another stab at this provided that I can enlist the help of one of my users to design valid test cases.

[idpaterson]

This will be revisited after the test architecture is rewritten. I created very simple tests this morning to make sure that the "test all locales" logic was working and even something as simple as these "ago" phrases did not work for German:

past_integer_values:
    sourceTime: *arbitrary_date
    cases:
        - context: !pdtContext minute
          target: !timedelta
            minutes: -5
          phrases:
            - "5 minuten vorheriger"
        - context: !pdtContext hour
          target: !timedelta
            hours: -34
          phrases:
            - "34 stunden vergangener"
        - context: !pdtContext day
          target: !timedelta
            days: -2
          phrases:
            - "2 tage vergangener"

I don't know German but based on the locale config it looks like these should work. I had to use negative integers (-5 minuten, -34 stunden, -2 tage) to get the tests to pass. It will be very nice to have better test coverage for locales but looks like it might take a lot of work to get the tests to pass.