Request for docstring modification

[Na-Kawa]

In the function "interfacemaster.interface_generator.core.parse_limit", the description for the parameters "see the paper" is not useful and I cannot understand clearly even though see the paper. Please write appropriate description about the parameter.

[Na-Kawa]

In the function "interfacemaster.interface_generator.core.search_one_position_2D", the description of the parameter does not match the actual parameter. Please modify.

[kiyou]

"interfacemaster.symmetric_tilt.compute_sigma()" has the same issue above.

[kiyou]

"interfacemaster.interface_generator.terminates_scanner_slab_structure()" has no docstring.

[kiyou]

In the function "interfacemaster.interface_generator.core.search_fixed()", the description of the parameter does not match the actual parameter.