Expand Up @@ -202,9 +202,9 @@ The grammar for a replacement field is as follows: .. productionlist:: sf replacement_field: "{" [`field_name`] ["!" `conversion`] [":" `format_spec`] "}" field_name: arg_name ("." `attribute_name` | "[" `element_index` "]")* arg_name: [`identifier` | `integer`] arg_name: [`identifier` | `digit`+] attribute_name: `identifier` element_index: `integer` | `index_string` element_index: `digit`+ | `index_string` index_string: <any source character except "]"> + conversion: "r" | "s" | "a" format_spec: <described in the next section> Expand Down