Fix script tests for Python 3

Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/trans/tests/test_scripts.py

@@ -34,10 +34,12 @@ class ScriptTest(RepoTestCase):
     def setUp(self):
         super(ScriptTest, self).setUp()
         self.output = tempfile.NamedTemporaryFile(delete=False)
-        self.script = tempfile.NamedTemporaryFile(delete=False)
+        self.script = tempfile.NamedTemporaryFile(delete=False, mode='wb+')
         self.output.close()
-        self.script.write('#!/bin/sh\n')
-        self.script.write('echo "$WL_PATH" >> {0}\n'.format(self.output.name))
+        self.script.write(b'#!/bin/sh\n')
+        self.script.write(b'echo "$WL_PATH" >> ')
+        self.script.write(self.output.name.encode('utf-8'))
+        self.script.write(b'\n')
         self.script.close()
         file_stat = os.stat(self.script.name)
         os.chmod(self.script.name, file_stat.st_mode | stat.S_IEXEC)