Description of problem:
On this page (https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/sect-kickstart-syntax.html#sect-kickstart-packages), there is the following sentence:

"--pesize= - Set the size of the volume group's physical extents in kilobytes (KiB). The default value is 4096 (4 MiB), and the minimum value is 1024 (1 MiB)"

But kilobytes (1000 bytes) are represented by kB, not KiB (kibibyte, 1024 bytes). More information can be found on Wikipedia (https://en.wikipedia.org/wiki/Kilobyte)

The documentation is inconsistent about what units are being used.
I would have expected it to either say:

"extents in kilobytes (kB)"

or

"extents in kibibytes (KiB)"

depending on what is actually used.