fix typo in export-all-in-page (vercel#15925)

matamatanot · web-flow · commit 2c424446b80f · 2020-08-06T00:11:11.000Z
diff --git a/errors/export-all-in-page.md b/errors/export-all-in-page.md
@@ -29,7 +29,7 @@ export function getStaticProps() {
 export * from './one'
 ```
 
-Would cause cause the following error:
+Would cause the following error:
 
 ```
 Module not found: Can't resolve 'fs' in './pages/two.js'
