fix(nextjs): remove stray double space in clerkMiddleware detection error (#9408)

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: manovotny

.changeset/tidy-cameras-jump.md

@@ -0,0 +1,5 @@
+---
+'@clerk/nextjs': patch
+---
+
+Fix a stray double space in the `getAuth()` "Clerk can't detect usage of clerkMiddleware()" error, so the first bullet renders as `- clerkMiddleware() is used in your Next.js middleware or proxy file.`

packages/nextjs/src/server/errors.ts

@@ -24,7 +24,7 @@ export const getAuthAuthHeaderMissing = () => authAuthHeaderMissing('getAuth', u
 
 export const authAuthHeaderMissing = (helperName = 'auth', prefixSteps?: string[], fileReference = 'middleware') => {
   return `Clerk: ${helperName}() was called but Clerk can't detect usage of clerkMiddleware(). Please ensure the following:
-- ${prefixSteps ? [...prefixSteps, ''].join('\n- ') : ' '}clerkMiddleware() is used in your Next.js ${fileReference} file.
+- ${prefixSteps ? [...prefixSteps, ''].join('\n- ') : ''}clerkMiddleware() is used in your Next.js ${fileReference} file.
 - Your ${fileReference} matcher is configured to match this route or page.
 - If you are using the src directory, make sure the ${fileReference} file is inside of it.