From e889c68aff33adeddf2ea9931ded9c70c86ab2cf Mon Sep 17 00:00:00 2001
From: Filipe Silva <filipematossilva@gmail.com>
Date: Tue, 26 Sep 2017 19:25:57 +0100
Subject: [PATCH] fix(compiler-cli): don't join errors with comma (#19331)

---
 packages/compiler-cli/src/perform_compile.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/compiler-cli/src/perform_compile.ts b/packages/compiler-cli/src/perform_compile.ts
index 2f53d37949..18fc69b9eb 100644
--- a/packages/compiler-cli/src/perform_compile.ts
+++ b/packages/compiler-cli/src/perform_compile.ts
@@ -43,7 +43,7 @@ export function formatDiagnostics(options: api.CompilerOptions, diags: Diagnosti
             return res;
           }
         })
-        .join();
+        .join('');
   } else
     return '';
 }