Update clippy_lints/src/methods/join_absolute_paths.rs

Co-authored-by: Catherine Flores <catherine.3.flores@gmail.com>

Author: ofeeg

clippy_lints/src/methods/join_absolute_paths.rs

@@ -9,19 +9,21 @@ use super::JOIN_ABSOLUTE_PATHS;
 
 pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>, join_arg: &'tcx Expr<'tcx>) {
     let ty = cx.typeck_results().expr_ty(expr).peel_refs();
-    if !expr.span.from_expansion() && is_type_diagnostic_item(cx, ty, Path)
-    && let ExprKind::Lit(spanned) = &join_arg.kind && let LitKind::Str(symbol, _) = spanned.node
-    && (symbol.as_str().starts_with('/') || symbol.as_str().starts_with('\\')) {
-      span_lint_and_then(
-        cx,
-        JOIN_ABSOLUTE_PATHS,
-        join_arg.span,
-        "argument to `Path::join` starts with a path separator",
-        |diag| {
-          diag.note("joining a path starting with separator will replace the path instead");
-          diag.help(r#"if this is unintentional, try removing the starting separator"#);
-          diag.help(r#"if this is intentional, try creating a new Path instead"#);
-        },
-      );
-    };
-}
+    if is_type_diagnostic_item(cx, ty, Path)
+        && let ExprKind::Lit(spanned) = &join_arg.kind
+        && let LitKind::Str(symbol, _) = spanned.node
+        && (symbol.as_str().starts_with('/') || symbol.as_str().starts_with('\\'))
+    {
+        span_lint_and_then(
+            cx,
+            JOIN_ABSOLUTE_PATHS,
+            join_arg.span,
+            "argument to `Path::join` starts with a path separator",
+            |diag| {
+                diag
+                      .note("joining a path starting with separator will replace the path instead")
+                      .help(r#"if this is unintentional, try removing the starting separator"#)
+                      .help(r#"if this is intentional, try creating a new Path instead"#);
+            },
+        );
+    }