'/execute if (block|blocks)' autocompletes the position to a float value

The bug

With the new /execute command syntax, the subcommands if block and if blocks take a world position, but the autocomplete for the block's position suggests a number past the integral value. This is inconsistent with other commands pertaining to blocks, whose autocomplete suggests integer values as blocks are aligned to the block grid.

Steps to reproduce:

• Set up a new world with the Upcoming Creator Features experiment enabled.
• Start typing out the command below while aiming at a block:

  /execute if block
  

→ The autocomplete for the position suggests a float value.