Rename clean::Span::span() to clean::Span::inner()

Otherwise you get a lot of instances of `item.span.span()`, which is
just plain confusing. `item.span.inner()` conveys the correct meaning of
"get the type that `clean::Span` wraps".

src/librustdoc/clean/types.rs

@@ -1866,12 +1866,12 @@ impl Span {
         Self(sp.source_callsite())
     }
 
-    crate fn dummy() -> Self {
+    crate fn inner(&self) -> rustc_span::Span {
-        Self(rustc_span::DUMMY_SP)
+        self.0
     }
 
-    crate fn span(&self) -> rustc_span::Span {
+    crate fn dummy() -> Self {
-        self.0
+        Self(rustc_span::DUMMY_SP)
     }
 
     crate fn is_dummy(&self) -> bool {

src/librustdoc/html/render/print_item.rs

@@ -937,7 +937,7 @@ fn item_macro(w: &mut Buffer, cx: &Context<'_>, it: &clean::Item, t: &clean::Mac
             Some("macro"),
             None,
             None,
-            it.span.span().edition(),
+            it.span.inner().edition(),
         );
     });
     document(w, cx, it, None)

src/librustdoc/passes/check_code_block_syntax.rs

@@ -86,7 +86,7 @@ impl<'a, 'tcx> SyntaxChecker<'a, 'tcx> {
                 // We couldn't calculate the span of the markdown block that had the error, so our
                 // diagnostics are going to be a bit lacking.
                 let mut diag = self.cx.sess().struct_span_warn(
-                    super::span_of_attrs(&item.attrs).unwrap_or(item.span.span()),
+                    super::span_of_attrs(&item.attrs).unwrap_or(item.span.inner()),
                     "doc comment contains an invalid Rust code block",
                 );
 
@@ -110,7 +110,7 @@ impl<'a, 'tcx> SyntaxChecker<'a, 'tcx> {
 impl<'a, 'tcx> DocFolder for SyntaxChecker<'a, 'tcx> {
     fn fold_item(&mut self, item: clean::Item) -> Option<clean::Item> {
         if let Some(dox) = &item.attrs.collapsed_doc_value() {
-            let sp = span_of_attrs(&item.attrs).unwrap_or(item.span.span());
+            let sp = span_of_attrs(&item.attrs).unwrap_or(item.span.inner());
             let extra = crate::html::markdown::ExtraInfo::new_did(self.cx.tcx, item.def_id, sp);
             for code_block in markdown::rust_code_blocks(&dox, &extra) {
                 self.check_rust_syntax(&item, &dox, code_block);

src/librustdoc/passes/collect_intra_doc_links.rs

@@ -1226,7 +1226,7 @@ impl LinkCollector<'_, '_> {
                             &ori_link.range,
                             &item.attrs,
                         )
-                        .unwrap_or_else(|| span_of_attrs(&item.attrs).unwrap_or(item.span.span()));
+                        .unwrap_or_else(|| span_of_attrs(&item.attrs).unwrap_or(item.span.inner()));
 
                         rustc_session::parse::feature_err(
                             &self.cx.tcx.sess.parse_sess,
@@ -1691,7 +1691,7 @@ fn report_diagnostic(
     };
 
     let attrs = &item.attrs;
-    let sp = span_of_attrs(attrs).unwrap_or(item.span.span());
+    let sp = span_of_attrs(attrs).unwrap_or(item.span.inner());
 
     tcx.struct_span_lint_hir(lint, hir_id, sp, |lint| {
         let mut diag = lint.build(msg);

src/librustdoc/passes/doc_test_lints.rs

@@ -97,7 +97,7 @@ crate fn look_for_tests<'tcx>(cx: &DocContext<'tcx>, dox: &str, item: &Item) {
     if tests.found_tests == 0 && cx.tcx.sess.is_nightly_build() {
         if should_have_doc_example(cx, &item) {
             debug!("reporting error for {:?} (hir_id={:?})", item, hir_id);
-            let sp = span_of_attrs(&item.attrs).unwrap_or(item.span.span());
+            let sp = span_of_attrs(&item.attrs).unwrap_or(item.span.inner());
             cx.tcx.struct_span_lint_hir(
                 crate::lint::MISSING_DOC_CODE_EXAMPLES,
                 hir_id,
@@ -109,7 +109,7 @@ crate fn look_for_tests<'tcx>(cx: &DocContext<'tcx>, dox: &str, item: &Item) {
         cx.tcx.struct_span_lint_hir(
             crate::lint::PRIVATE_DOC_TESTS,
             hir_id,
-            span_of_attrs(&item.attrs).unwrap_or(item.span.span()),
+            span_of_attrs(&item.attrs).unwrap_or(item.span.inner()),
             |lint| lint.build("documentation test in private item").emit(),
         );
     }

src/librustdoc/passes/html_tags.rs

@@ -181,7 +181,7 @@ impl<'a, 'tcx> DocFolder for InvalidHtmlTagsLinter<'a, 'tcx> {
                 let sp = match super::source_span_for_markdown_range(tcx, &dox, range, &item.attrs)
                 {
                     Some(sp) => sp,
-                    None => span_of_attrs(&item.attrs).unwrap_or(item.span.span()),
+                    None => span_of_attrs(&item.attrs).unwrap_or(item.span.inner()),
                 };
                 tcx.struct_span_lint_hir(crate::lint::INVALID_HTML_TAGS, hir_id, sp, |lint| {
                     lint.build(msg).emit()

src/librustdoc/passes/non_autolinks.rs

@@ -72,7 +72,7 @@ impl<'a, 'tcx> DocFolder for NonAutolinksLinter<'a, 'tcx> {
             let report_diag = |cx: &DocContext<'_>, msg: &str, url: &str, range: Range<usize>| {
                 let sp = super::source_span_for_markdown_range(cx.tcx, &dox, &range, &item.attrs)
                     .or_else(|| span_of_attrs(&item.attrs))
-                    .unwrap_or(item.span.span());
+                    .unwrap_or(item.span.inner());
                 cx.tcx.struct_span_lint_hir(crate::lint::NON_AUTOLINKS, hir_id, sp, |lint| {
                     lint.build(msg)
                         .span_suggestion(