Intermediate changes

commit_hash:bbe5982909469ab84284cb16547e69a096d992ea

Author: robot-piglet

library/python/testing/yatest_common/yatest/common/canonical.py

@@ -14,10 +14,11 @@
 
 def _copy(src, dst, universal_lines=False):
     if universal_lines:
-        with open(dst, "wb") as f:
+        with open(dst, "wb") as f_dst:
             mode = "rbU" if six.PY2 else "rb"
-            for line in open(src, mode):
-                f.write(line)
+            with open(src, mode) as f_src:
+                for line in f_src:
+                    f_dst.write(line)
         return
     shutil.copy(src, dst)