Add doc-comments to the new files

crates/completion/src/render.rs

@@ -23,11 +23,13 @@ pub(crate) use crate::render::{
     macro_::MacroRender, type_alias::TypeAliasRender,
 };
 
+/// Generic renderer for completion items.
 #[derive(Debug)]
 pub(crate) struct Render<'a> {
     ctx: RenderContext<'a>,
 }
 
+/// Interface for data and methods required for items rendering.
 #[derive(Debug)]
 pub(crate) struct RenderContext<'a> {
     completion: &'a CompletionContext<'a>,

crates/completion/src/render/const_.rs

@@ -1,3 +1,5 @@
+//! Renderer for `const` fields.
+
 use hir::HasSource;
 use syntax::{
     ast::{Const, NameOwner},

crates/completion/src/render/enum_variant.rs

@@ -1,3 +1,5 @@
+//! Renderer for `enum` variants.
+
 use hir::{HasAttrs, HirDisplay, ModPath, StructKind};
 use itertools::Itertools;
 use test_utils::mark;

crates/completion/src/render/function.rs

@@ -1,3 +1,5 @@
+//! Renderer for function calls.
+
 use hir::{HasSource, Type};
 use syntax::{ast::Fn, display::function_declaration};
 

crates/completion/src/render/macro_.rs

@@ -1,3 +1,5 @@
+//! Renderer for macro invocations.
+
 use hir::{Documentation, HasSource};
 use syntax::display::macro_label;
 use test_utils::mark;
@@ -66,7 +68,11 @@ impl<'a> MacroRender<'a> {
     }
 
     fn label(&self) -> String {
-        format!("{}!{}…{}", self.name, self.bra, self.ket)
+        if self.needs_bang() && self.ctx.snippet_cap().is_some() {
+            format!("{}!{}…{}", self.name, self.bra, self.ket)
+        } else {
+            self.banged_name()
+        }
     }
 
     fn snippet(&self) -> String {

crates/completion/src/render/type_alias.rs

@@ -1,3 +1,5 @@
+//! Renderer for type aliases.
+
 use hir::HasSource;
 use syntax::{
     ast::{NameOwner, TypeAlias},