Auto merge of #12974 - fprasx:master, r=lnicola
Auto merge of #12974 - fprasx:master, r=lnicola

Corrected order of printing op and `=`

Fixes https://github.com/rust-lang/rust-analyzer/issues/12971 where `Display` impl for assignment operators does `=+` instead of `+=`

rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer