[System18] corrects price change when emr issuing

[philcampeau]

Fixes #11161

Before clicking "Create"

• Branch is derived from the latest master
• Add the pins or archive_alpha_games label if this change will break existing games
• Code passes linter with docker compose exec rack rubocop -a
• Tests pass cleanly with docker compose exec rack rake

Implementation Notes

Explanation of Change

According to the rules (see below), shares issued during EMR in incremental cap games should only drop the price by a single space. The code had movement: :left_share. Corrected to :left_block.

This will only affect existing incremental cap games where multiple shares were issued during EMR.

Screenshots

Any Assumptions / Hacks