# <symbolic matrix>.simplify_rational() accepts no keywords?

I have a symbolic matrix whose entries I would like to simplify for display. Minimal working example (in the `sage`

REPL):

```
a,b=var('a,b'); m=matrix(SR,2,[[(a*b-a)/a,0],[0,1]]).simplify_rational()
```

works fine and upon calling `m`

produces

```
[b - 1 0]
[ 0 1]
```

as expected. On the other hand, running

```
a,b=var('a,b'); m=matrix(SR,2,[[(a*b-a)/a,0],[0,1]]).simplify_rational(algorithm='simple')
```

as per the documentation produces

TypeError Traceback (most recent call last) <ipython-input-30-3edf7642200d> in <module>() ----> 1 a,b=var('a,b'); m=matrix(SR,Integer(2),[[(a*b-a)/a,Integer(0)],[Integer(0),Integer(1)]]).simplify_rational(algorithm='simple')

TypeError: simplify_rational() takes no keyword argument

If I apply the method to a *single* expression it works fine:

```
((a*b-a)/a).simplify_rational(algorithm='simple')
```

gives back `b-1`

.