fix: escape module specifier for snippet after quoted (#53407)

src/services/completions.ts

@@ -1991,7 +1991,7 @@ function completionEntryDataToSymbolOriginInfo(data: CompletionEntryData, comple
 
 function getInsertTextAndReplacementSpanForImportCompletion(name: string, importStatementCompletion: ImportStatementCompletionInfo, origin: SymbolOriginInfoResolvedExport, useSemicolons: boolean, sourceFile: SourceFile, options: CompilerOptions, preferences: UserPreferences) {
     const replacementSpan = importStatementCompletion.replacementSpan;
-    const quotedModuleSpecifier = quote(sourceFile, preferences, escapeSnippetText(origin.moduleSpecifier));
+    const quotedModuleSpecifier = escapeSnippetText(quote(sourceFile, preferences, origin.moduleSpecifier));
     const exportKind =
         origin.isDefaultExport ? ExportKind.Default :
         origin.exportName === InternalSymbolName.ExportEquals ? ExportKind.ExportEquals :

tests/baselines/reference/importStatementCompletions3.baseline

@@ -34,7 +34,7 @@
               "kind": "text"
             }
           ],
-          "insertText": "import { foo$1 } from \"./\\\\$foo\";",
+          "insertText": "import { foo$1 } from \"./\\$foo\";",
           "replacementSpan": {
             "start": 0,
             "length": 8