Auto merge of #12225 - Veykril:tmapfloats, r=Veykril
Auto merge of #12225 - Veykril:tmapfloats, r=Veykril

internal: Add token mapping test for float literals

cc https://github.com/rust-lang/rust-analyzer/issues/12216

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