Remove notion of "level" from `Module::dump_to_str`. (#52539)
Summary:
The code uses `torch::jit::jit_log_prefix` for handling recursive
indenting in most places in this function. There was one place that was
using "level", but it was buggy -- it would result in a compounding
superlinear indent. Note that changing it to "level+1" doesn't fix the
bug.
Before/after:
https://gist.github.com/silvasean/8ee3ef115a48de6c9c54fbc40838d8d7
The new code establishes a recursive invariant for
`Module::dump_to_str`: the function returns the module printed at the
base indent level (i.e. no indent). `torch::jit:log_prefix` is used
to prefix recursive calls. The code was already nearly there, except for
this spurious use of "level".
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52539
Reviewed By: navahgar
Differential Revision: D26773657
Pulled By: gmagogsfm
fbshipit-source-id: ab476f0738bf07de9f40d168dd038dbf62a9a79e
