format explanation of x, xx, x0, x_in_x0, xxx, x00, x_in_x00, xx00, xx_in_xx00, x000

[MrTheBarbarian]

Hello! I'm trying to make translation to bulgarian. I need info and if it is possible examples of information which have to be formatted and how have to be look like after formatting. I started with date_time.json in res/text/ru-ru/ and I need help with interpretation of:

"decade_format": { "1": {"match": "^\d$", "format": "{x}"}, "2": {"match": "^1\d$", "format": "{xx}"}, "3": {"match": "^\d0$", "format": "{x0}"}, "4": {"match": "^[2-9]\d$", "format": "{x0} {x}"}, "default": "{number}" I will do my best to not asking for stupid questions, but I'm really motivated to make this. thanks a lot!