Some tuning of rustfmt

rustfmt.toml

@@ -3,13 +3,15 @@ max_width=1000
 ideal_width=1000
 tabs_spaces=4
 fn_call_width=1000
+struct_lit_width=32
 fn_arg_indent="Tabbed"
 single_line_if_else=true
 where_indent="Visual"
 where_trailing_comma=true
 chain_base_indent="Inherit"
-chain_indent="Tabbed"
+chain_indent="Inherit"
 reorder_imports=true
 format_strings=false
+chain_overflow_last=false
 hard_tabs=true
 wrap_match_arms=false