Add arguments to rustfmt

editors/code/src/client.ts

@@ -42,6 +42,7 @@ export async function createClient(config: Config): Promise<null | lc.LanguageCl
             featureFlags: config.featureFlags,
             withSysroot: config.withSysroot,
             cargoFeatures: config.cargoFeatures,
+            rustfmtArgs: config.rustfmtArgs,
         },
         traceOutputChannel,
     };

editors/code/src/config.ts

@@ -149,7 +149,8 @@ export class Config {
     get excludeGlobs()          { return this.cfg.get("excludeGlobs") as string[]; }
     get useClientWatching()     { return this.cfg.get("useClientWatching") as boolean; }
     get featureFlags()          { return this.cfg.get("featureFlags") as Record<string, boolean>; }
-
+    get rustfmtArgs()           { return this.cfg.get("rustfmtArgs") as string[]; }
+    
     get cargoWatchOptions(): CargoWatchOptions {
         return {
             enable:     this.cfg.get("cargo-watch.enable") as boolean,