fix docstring

[joamatab]

Summary by Sourcery

Clarify docstrings in initialize_sde and write_sde to specify parameter types and add missing parameter descriptions. Update tests to include assertions.

Documentation:

• Improve documentation for initialize_sde and write_sde parameters.

Tests:

• Add assertions to tests in test_materials.py.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request fixes the docstrings in the sde.py and test_materials.py files.

Class diagram showing updated function signatures in sde.py

classDiagram
    class sde {
        +initialize_sde(component, waferstack, layermap, xsection_bounds, u_offset, round_tol, simplify_tol, header_str) str
        +write_sde(component, waferstack, layermap, process, contact_str, slice_str, init_tdr, save_directory, execution_directory, filename, fileout, round_tol, simplify_tol, device_remesh, remesh_str, header_str, num_threads) void
    }
    note for sde "Docstring updates for better parameter documentation"

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File-Level Changes

Change	Details	Files
Fixed docstrings in initialize_sde function.	Clarified the description of the component argument. Fixed the description of the xsection_bounds argument. Removed the description of the process argument. Added descriptions for the round_tol, simplify_tol, and header_str arguments.	gplugins/sentaurus/sde.py
Fixed docstrings in write_sde function.	Clarified the descriptions of the component, waferstack, layermap, and process arguments. Added descriptions for the contact_str, slice_str, and init_tdr arguments. Removed descriptions for the u_offset, filename, struct_prefix, structout, contact_portnames, split_steps, init_lines, initial_z_resolutions, initial_xy_resolution, and global_device_remeshing_str arguments. Added descriptions for the fileout, round_tol, simplify_tol, device_remesh, remesh_str, and header_str arguments.	gplugins/sentaurus/sde.py
Fixed assertions in tests.	Added assertions to check the _data attribute of the strip object in multiple test cases.	gplugins/tidy3d/tests/test_materials.py

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