add doc-hidden to exports in attribute prelude

Author: jdonszelmann

compiler/rustc_attr_parsing/src/attributes/prelude.rs

@@ -1,20 +1,30 @@
-// parsing
 // templates
+#[doc(hidden)]
 pub(super) use rustc_feature::{AttributeTemplate, template};
 // data structures
+#[doc(hidden)]
 pub(super) use rustc_hir::attrs::AttributeKind;
+#[doc(hidden)]
 pub(super) use rustc_hir::lints::AttributeLintKind;
+#[doc(hidden)]
 pub(super) use rustc_hir::{MethodKind, Target};
+#[doc(hidden)]
 pub(super) use rustc_span::{DUMMY_SP, Ident, Span, Symbol, sym};
+#[doc(hidden)]
 pub(super) use thin_vec::ThinVec;
 
+#[doc(hidden)]
 pub(super) use crate::attributes::{
     AcceptMapping, AttributeOrder, AttributeParser, CombineAttributeParser, ConvertFn,
     NoArgsAttributeParser, OnDuplicate, SingleAttributeParser,
 };
 // contexts
+#[doc(hidden)]
 pub(super) use crate::context::{AcceptContext, FinalizeContext, Stage};
+#[doc(hidden)]
 pub(super) use crate::parser::*;
 // target checking
+#[doc(hidden)]
 pub(super) use crate::target_checking::Policy::{Allow, Error, Warn};
+#[doc(hidden)]
 pub(super) use crate::target_checking::{ALL_TARGETS, AllowedTargets};