Add template for print_item

Add print_item.html and the code in print_item.rs to use it.

src/librustdoc/html/render/context.rs

@@ -33,7 +33,7 @@ use crate::formats::FormatRenderer;
 use crate::html::escape::Escape;
 use crate::html::format::Buffer;
 use crate::html::markdown::{self, plain_text_summary, ErrorCodes, IdMap};
-use crate::html::static_files::PAGE;
+use crate::html::static_files::{PAGE, PRINT_ITEM};
 use crate::html::{layout, sources};
 
 /// Major driving force in all rustdoc rendering. This contains information
@@ -225,7 +225,7 @@ impl<'tcx> Context<'tcx> {
                 &self.shared.layout,
                 &page,
                 |buf: &mut _| print_sidebar(self, it, buf),
-                |buf: &mut _| print_item(self, it, buf, &page),
+                |buf: &mut _| print_item(self, &self.shared.templates, it, buf, &page),
                 &self.shared.style_files,
             )
         } else {
@@ -422,6 +422,10 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             file: "page.html".into(),
             error: format!("{}: {}", e, e.source().map(|e| e.to_string()).unwrap_or_default()),
         })?;
+        templates.add_raw_template("print_item.html", PRINT_ITEM).map_err(|e| Error {
+            file: "print_item.html".into(),
+            error: format!("{}: {}", e, e.source().map(|e| e.to_string()).unwrap_or_default()),
+        })?;
 
         // Crawl the crate attributes looking for attributes which control how we're
         // going to emit HTML