Fix minor inaccuracy in translate error reporting (#53032)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53032
Previously, you could get this error message:
```
Failed to synthesize the expression "Tensor & out".
When I failed, the following bindings were available in the context:
const Tensor & self;
const Tensor & other;
Scalar alpha;
const Tensor & op.outputs_[0];
```
There's a problem with this error message: it doesn't seem like there
is any 'out' argument available, but actually there is: the last
binding in the context is it. We printed the *expression*, not
the *ctype name*.
After this patch, the context now prints as:
```
const Tensor & self; // self
const Tensor & other; // other
Scalar alpha; // alpha
const Tensor & out; // op.outputs_[0]
```
Now it becomes clear that it's a const mismatch. Maybe we could also
beef up the error message so it points out near misses, but I'll leave
that to future work.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Reviewed By: ljk53
Differential Revision: D26729768
Pulled By: ezyang
fbshipit-source-id: adb363551a7145eac788943c20969c86b1f8a81b
