bug: shebang line causes module docs to be omitted

[iuioiua]

To reproduce:

1. Clone and cd into deno_std.
2. Generate docs for @std/http/file-server using deno doc --html http/file_server.ts. Note: http/file_server.ts starts contains a shebang line (see here).
3. Open docs using open docs/index.html and observe there is no module documentation, even though http/file_server.ts contains it (see here).
4. Remove the shebang line from http/file_server.ts.
5. Generate and open docs again and observe there is now module documentation.

deno 1.44.4+09cc473 (canary, aarch64-apple-darwin)
v8 12.6.228.9
typescript 5.4.5

[MujahedSafaa]

I will take a look at this issue