Clarify muliti-line chain elements

guide/expressions.md

@@ -451,16 +451,17 @@ foo(
 
 #### Multi-line elements
 
-If any element in a chain is formatted across multiple lines, then that element
-and any later elements must be on their own line. Earlier elements may be kept
-on a single line. E.g.,
+If any element in a chain is formatted across multiple lines, then all
+surrounding elements must be on their own line. Though multiple elements may be
+on the first line for reasons described above. E.g.,
 
 ```rust
-a.b.c()?.d
-    .foo(
-        an_expr,
-        another_expr,
-    )
+a.b.c()?
+    .d
+    .foo(|arg| {
+        a_stmt;
+        another_stmt;
+    })
     .bar
     .baz
 ```