integrate the rest of doc comments with generated docs

[andrewrk]

Currently function doc comments and error set doc comments are integrated, but not these:

• doc comments of struct fields
• doc comments of enum fields
• doc comments of union fields
• doc comments of structs
• doc comments of enums
• doc comments of unions
• doc comments of generic instantiations (related: add generic instantiations to generated docs #3407)
• doc comments of global variables and constants
• doc comments of parameters

[FlyingWombat]

I'm not sure if this is what you meant by "the rest of doc comments", but (as of version 0.5.0+10e0b0713) only the first line of a multi-line doc comment is included in the generated HTML documentation.

For std.io.InStream.readAll()
Docs read:

Returns the number of bytes read. If the number read is smaller than buffer.len, it

Doc comment above readAll in lib/std/io/in_stream.zig:34:

/// Returns the number of bytes read. If the number read is smaller than `buffer.len`, it
/// means the stream reached the end. Reaching the end of a stream is not an error
/// condition.

[nektro]

The class view shows the first line as a preview. The function page shows the entire description.

vs

[nektro]

Although, on your original point, the io.InStream.readAll page actually shows a 404. Though the network tab in devtools shows no activity.