Put the second element of a chain on its own line when block formatting.

src/chains.rs

@@ -113,7 +113,8 @@ pub fn rewrite_chain(expr: &ast::Expr, context: &RewriteContext, shape: Shape) -
         } else {
             chain_indent(context, shape.add_offset(parent_rewrite.len()))
         };
-        (nested_shape, true)
+        (nested_shape, context.config.chain_indent == IndentStyle::Visual ||
+                       parent_rewrite.len() <= context.config.tab_spaces)
     } else if is_block_expr(&parent, &parent_rewrite) {
         // The parent is a block, so align the rest of the chain with the closing
         // brace.