Use a context handler for file handling in paramiko_ssh.Connection. (#65624)

changelogs/fragments/65624-paramiko-ctx-man.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - paramiko_ssh - optimized file handling by using a context manager.

lib/ansible/plugins/connection/paramiko_ssh.py

@@ -517,7 +517,7 @@ class Connection(ConnectionBase):
         path = os.path.expanduser("~/.ssh")
         makedirs_safe(path)
 
-        f = open(filename, 'w')
+        with open(filename, 'w') as f:
 
             for hostname, keys in iteritems(self.ssh._host_keys):
 
@@ -535,8 +535,6 @@ class Connection(ConnectionBase):
                     if added_this_time:
                         f.write("%s %s %s\n" % (hostname, keytype, key.get_base64()))
 
-        f.close()
-
     def reset(self):
         self.close()
         self._connect()