Auto merge of #46624 - emilio:nit, r=kennytm
Auto merge of #46624 - emilio:nit, r=kennytm

rustc_trans: Fix indentation in trans_set_discr.

Just noticed this while reading through #46521, which introduced this weird
alignment.

graydon/rust,aidancully/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,graydon/rust,GBGamer/rust,graydon/rust,aidancully/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,graydon/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,graydon/rust,graydon/rust