I want to diff two files and ignore lines that are present in one file but missing in the other.

For example

**File1:**

```
foo
bar
baz
bat

```

**File2:**

```
foo
ball
bat

```

I'm currently running the following diff command

```
diff File1 File2 --changed-group-format='%>' --unchanged-group-format=''

```

Which in this case would produce

```
bar
baz

```

as the output, i.e. only missing or conflicting lines. I would like to only print conflicting lines, i.e. ignore cases where one line is missing from File2 and is present in File1 (not the other way around). Is there any way to do something like this using diff or do I have to resort to other tools? If so, what would you recommend?