Rollup merge of #88211 - petrochenkov:withhilo, r=jyn514

cleanup: `Span::new` -> `Span::with_lo`

Extracted from https://github.com/rust-lang/rust/pull/84373 as suggested in https://github.com/rust-lang/rust/pull/84373#issuecomment-857773867.
It turned out less useful then I expected, but anyway.
r? `@cjgillot`
`@bors` rollup

compiler/rustc_middle/src/middle/region.rs

@@ -189,7 +189,7 @@ impl Scope {
                 // To avoid issues with macro-generated spans, the span
                 // of the statement must be nested in that of the block.
                 if span.lo() <= stmt_span.lo() && stmt_span.lo() <= span.hi() {
-                    return Span::new(stmt_span.lo(), span.hi(), span.ctxt());
+                    return span.with_lo(stmt_span.lo());
                 }
             }
         }

compiler/rustc_typeck/src/check/compare_method.rs

@@ -708,11 +708,7 @@ fn compare_number_of_method_arguments<'tcx>(
                         Some(if pos == 0 {
                             arg.span
                         } else {
-                            Span::new(
-                                trait_m_sig.decl.inputs[0].span.lo(),
-                                arg.span.hi(),
-                                arg.span.ctxt(),
-                            )
+                            arg.span.with_lo(trait_m_sig.decl.inputs[0].span.lo())
                         })
                     } else {
                         trait_item_span
@@ -731,11 +727,7 @@ fn compare_number_of_method_arguments<'tcx>(
                     if pos == 0 {
                         arg.span
                     } else {
-                        Span::new(
-                            impl_m_sig.decl.inputs[0].span.lo(),
-                            arg.span.hi(),
-                            arg.span.ctxt(),
-                        )
+                        arg.span.with_lo(impl_m_sig.decl.inputs[0].span.lo())
                     }
                 } else {
                     impl_m_span

src/tools/clippy/clippy_lints/src/unit_return_expecting_ord.rs

@@ -127,7 +127,7 @@ fn check_arg<'tcx>(cx: &LateContext<'tcx>, arg: &'tcx Expr<'tcx>) -> Option<(Spa
                 then {
                     let data = stmt.span.data();
                     // Make a span out of the semicolon for the help message
-                    Some((span, Some(Span::new(data.hi-BytePos(1), data.hi, data.ctxt))))
+                    Some((span, Some(data.with_lo(data.hi-BytePos(1)))))
                 } else {
                     Some((span, None))
                 }

src/tools/clippy/clippy_lints/src/write.rs

@@ -299,7 +299,7 @@ impl EarlyLintPass for Write {
                     let nl_span = match (dest, only_nl) {
                         // Special case of `write!(buf, "\n")`: Mark everything from the end of
                         // `buf` for removal so no trailing comma [`writeln!(buf, )`] remains.
-                        (Some(dest_expr), true) => Span::new(dest_expr.span.hi(), nl_span.hi(), nl_span.ctxt()),
+                        (Some(dest_expr), true) => nl_span.with_lo(dest_expr.span.hi()),
                         _ => nl_span,
                     };
                     span_lint_and_then(

src/tools/clippy/clippy_utils/src/lib.rs

@@ -881,7 +881,7 @@ fn line_span<T: LintContext>(cx: &T, span: Span) -> Span {
     let source_map_and_line = cx.sess().source_map().lookup_line(span.lo()).unwrap();
     let line_no = source_map_and_line.line;
     let line_start = source_map_and_line.sf.lines[line_no];
-    Span::new(line_start, span.hi(), span.ctxt())
+    span.with_lo(line_start)
 }
 
 /// Gets the parent node, if any.