Auto merge of #12120 - iDawer:ide.sig_help, r=Veykril
Auto merge of #12120 - iDawer:ide.sig_help, r=Veykril

fix: Don't show signature help after closing bracket

Stop showing signature help after closing angle/round brackets.

Fixes #11624

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