Left arrow operator doesn't work

[detuur]

When using the left arrow operator to rename columns, the built-in arrow from the toolbar doesn't seem to work, no matter how you format it.

rho manufacturer <- maker (Product) --this works
rho manufacturer ← maker (Product) --this throws errors

If the left arrow operator is meant to work as the assignment operator (like in some dialects of relational algebra), that too doesn't seem to be working.

[michaelrampl]

This now works in the development version. We will update the release once the development version is stable.