# API Changes for 3.1.1

::: {.contents local="" depth="1"}
:::

## Behavior changes

### Locator.nonsingular return order

[.Locator.nonsingular]{.title-ref} (introduced in mpl 3.1) now returns a
range `v0, v1` with `v0 <= v1`. This behavior is consistent with the
implementation of `nonsingular` by the [.LogLocator]{.title-ref} and
[.LogitLocator]{.title-ref} subclasses.