fix offset encoding

vim/.vim/lua/plugins/rust.lua

@@ -2,6 +2,15 @@ return {
 	{
 		"vxpm/ferris.nvim",
 		ft = "rust",
+		config = function()
+			local capabilities = vim.lsp.protocol.make_client_capabilities()
+			capabilities.offsetEncoding = { "utf-16" }
+			require("lspconfig").rust_analyzer.setup({
+				-- offset_encoding = "utf-8",
+				-- capabilities,
+				settings = { ["rust-analyzer"] = {} },
+			})
+		end,
 	},
 
 	{