Description should be language-agnostic (in examples as well as the function signature)

Should explicitly mention whether start and target's edges can be determined using links, i.e, they are a valid location in links

This line should also be removed since the arguments given , if not mentioned, are always non-optional arguments.

Note for Ruby: The Hash provided for the 'links' argument will always have default = []

Ruby 3.0 should be enabled (Refer this & this for more detail)

stations is a redundant argument and should be removed.