X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/a2b5ba2a3a97eb3a0b5130a5b317bb750c1624cf..14072be245b909d2340e13c571e76bf36080cc5a:/src/black/__init__.py

diff --git a/src/black/__init__.py b/src/black/__init__.py
index a985926..8e2123d 100644
--- a/src/black/__init__.py
+++ b/src/black/__init__.py
@@ -803,7 +803,8 @@ def format_stdin_to_stdout(
         )
         if write_back == WriteBack.YES:
             # Make sure there's a newline after the content
-            dst += "" if dst[-1] == "\n" else "\n"
+            if dst and dst[-1] != "\n":
+                dst += "\n"
             f.write(dst)
         elif write_back in (WriteBack.DIFF, WriteBack.COLOR_DIFF):
             now = datetime.utcnow()