Original Summary:
partitioner ignores format on / target partition created subsequent to agreeing
to license

To reproduce:
1-select expert partitioner with existing partitions
2-select sda
3-select an existing unformatted partition
4-determine that it is impossible to format EXT4 using ^64bit option
5-cancel back to license screen
6-Ctrl-Alt-F2
7-format target partition EXT4 with desired options
8-partprobe
9-return to installation
10-select expert partitioner with existing partitions
11-select sda
12-select the freshly formatted partition

Actual behavior:
1-selected freshly formatted partition cannot be selected to mount to / without
formatting

Expected behavior:
1-selected freshly formatted partition can be mounted to / without formatting