ignore nested untyped modules, fix fuzziness

packages/pyright-internal/src/analyzer/binder.ts

@@ -4335,7 +4335,7 @@ export class Binder extends ParseTreeWalker {
     }
 
     private _ignoreUntypedModule(module: string) {
-        return this._fileInfo.diagnosticRuleSet.allowedUntypedLibraries.some(x => module.startsWith(x));
+        return this._fileInfo.diagnosticRuleSet.allowedUntypedLibraries.some(x => (module + ".").startsWith(x + "."));
     }
 }
 

packages/pyright-internal/src/analyzer/typeEvaluator.ts

@@ -15114,6 +15114,10 @@ export function createTypeEvaluator(
         return { type, isIncomplete, typeErrors };
     }
 
+    function _ignoreUntypedModule(ruleset: DiagnosticRuleSet, module: string) {
+        return ruleset.allowedUntypedLibraries.some(x => (module + ".").startsWith(x + "."));
+    }
+
     function reportPossibleUnknownAssignment(
         ruleset: DiagnosticRuleSet,
         rule: DiagnosticRule,
@@ -15130,7 +15134,7 @@ export function createTypeEvaluator(
         // Or if the object is in an untyped library that was explicitly mentioned.
         if (type.shared && "moduleName" in type.shared) {
             const moduleName = type.shared.moduleName;
-            if (ruleset.allowedUntypedLibraries.indexOf(moduleName) > -1) {
+            if (_ignoreUntypedModule(ruleset, moduleName)) {
                 return;
             }
         }