Fixes soulstoned players being cultists when the player who captured them wasn't, also fixes inconsistent indentation in soulstone.dm.
Changes soulstone.dm to use span classes.
Fixes errors caused by using quotation marks to specify the span class inside a string enclosed in quotations marks by replacing them with apostrophes.
Merge pull request #3630 from Boggart/soulstonefix

Fixes soulstoned players being cultists when the player who captured them wasn't.