Fix --check with multiple files (#88)

Passing multiple files to --check would previously result in the report
being printed as if the files had been written to.

diff --git a/black.py b/black.py
index 434bc332996f1539d5347013f9a4a0111b248ba9..dab3f004ff3289711dc26006b533844ad2268bac 100644 (file)
--- a/black.py
+++ b/black.py
@@ -181,7 +181,7 @@ async def schedule_formatting(
     }
     await asyncio.wait(tasks.values())
     cancelled = []
-    report = Report()
+    report = Report(check=not write_back)
     for src, task in tasks.items():
         if not task.done():
             report.failed(src, 'timed out, cancelling')