[PY 3.8] test fixes for file closings, rawstrings

On a linux host (missing some things that may be on the Travis CI
setup), Py3.8a3 now shows 19 fails, 1048 pass, with 84 Warning: messages.

Signed-off-by: Mats Wichmann <mats@linux.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/test/Scanner/exception.py b/test/Scanner/exception.py
index 1a14152..ec19842 100644
--- a/test/Scanner/exception.py
+++ b/test/Scanner/exception.py
@@ -61,16 +61,17 @@ def process(outf, inf):
     for line in inf.readlines():
         if line[:8] == 'include ':
             file = line[8:-1]
-            process(outf, open(file, 'rb'))
+            with open(file, 'rb') as ifp:
+                process(outf, ifp)
         else:
             outf.write(line)
 
 def cat(env, source, target):
     target = str(target[0])
-    outf = open(target, 'wb')
-    for src in source:
-        process(outf, open(str(src), 'rb'))
-    outf.close()
+    with open(target, 'wb') as outf:
+        for src in source:
+            with open(str(src), 'rb') as inf:
+                process(outf, inf)
 
 env = Environment(BUILDERS={'Cat':Builder(action=cat)})
 env.Append(SCANNERS = [kscan])