Sphinx build error: `ppt_distinguishability`

[purva-thakre]

As noticed in #440, some errors are raised in state_opt/ppt_distinguishability when make clean html is used.

This appears to be some kind of a docstring formatting issue or some incompatibility with AutoAPI.

https://sphinx-autoapi.readthedocs.io/en/latest/index.html

/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:121: WARNING: Explicit markup ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:125: ERROR: Unexpected indentation.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:126: WARNING: Block quote ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:127: WARNING: Definition list ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:128: WARNING: Definition list ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:133: WARNING: Explicit markup ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:137: ERROR: Unexpected indentation.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:138: WARNING: Block quote ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:142: WARNING: Definition list ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:143: WARNING: Definition list ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:158: WARNING: Explicit markup ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:162: ERROR: Unexpected indentation.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:163: WARNING: Block quote ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:167: WARNING: Definition list ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:168: WARNING: Definition list ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:173: WARNING: Explicit markup ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:177: ERROR: Unexpected indentation.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:179: WARNING: Block quote ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:181: ERROR: Unexpected indentation.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:182: WARNING: Block quote ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:186: WARNING: Definition list ends without a blank line; unexpected unindent.
/toqito/docs/autoapi/state_opt/ppt_distinguishability/index.rst:187: WARNING: Definition list ends without a blank line; unexpected unindent.

[purva-thakre]

Interestingly, the lines for the build error changed from yesterday.

Now, the errors are from some lines in the docstring of the main function and code in primal_problem.

Edit: If I get rid of the stuff under math in primal_problem and dual_problem, there are no build errors at all.