tests/conftest.py: flush stdout after each test.

Author: julian-smith-artifex-com

tests/conftest.py

@@ -1,5 +1,6 @@
 import os
 import platform
+import sys
 
 import pymupdf
 
@@ -47,6 +48,8 @@ def get_fds():
     # Run the test.
     rep = yield
 
+    sys.stdout.flush()
+    
     # Test has run; check it did not create any MuPDF warnings etc.
     wt = pymupdf.TOOLS.mupdf_warnings()
     if not hasattr(pymupdf, 'mupdf'):