Merge pull request #28485 from storybookjs/fix-regex-escaping

Addon Controls: Fix saving on Windows

code/core/src/core-server/utils/save-story/save-story.ts

@@ -35,8 +35,8 @@ const parseArgs = (args: string): Record<string, any> =>
 // Removes extra newlines between story properties. See https://github.com/benjamn/recast/issues/242
 // Only updates the part of the code for the story with the given name.
 const removeExtraNewlines = (code: string, name: string) => {
-  const anything = '(.|\r\n|\r|\n)'; // Multiline match for any character.
-  const newline = '(\r\n|\r|\n)'; // Either newlines or carriage returns may be used in the file.
+  const anything = '([\\s\\S])'; // Multiline match for any character.
+  const newline = '(\\r\\n|\\r|\\n)'; // Either newlines or carriage returns may be used in the file.
   const closing = newline + '};' + newline; // Marks the end of the story definition.
   const regex = new RegExp(
     // Looks for an export by the given name, considers the first closing brace on its own line