Rename fn_args_layout to fn_args_density

Author: nrc

src/config.rs

@@ -89,7 +89,7 @@ create_config! {
     fn_brace_style: BraceStyle,
     fn_return_indent: ReturnIndent,
     fn_args_paren_newline: bool,
-    fn_args_layout: Density,
+    fn_args_density: Density,
     fn_arg_indent: BlockIndentStyle,
     where_density: Density, // Should we at least try to put the where clause on the same line as
                             // the rest of the function decl?
@@ -122,7 +122,7 @@ impl Default for Config {
             fn_brace_style: BraceStyle::SameLineWhere,
             fn_return_indent: ReturnIndent::WithArgs,
             fn_args_paren_newline: true,
-            fn_args_layout: Density::Tall,
+            fn_args_density: Density::Tall,
             fn_arg_indent: BlockIndentStyle::Visual,
             where_density: Density::Tall,
             where_indent: BlockIndentStyle::Tabbed,

src/items.rs

@@ -363,7 +363,7 @@ impl<'a> FmtVisitor<'a> {
         };
 
         let fmt = ListFormatting {
-            tactic: self.config.fn_args_layout.to_list_tactic(),
+            tactic: self.config.fn_args_density.to_list_tactic(),
             separator: ",",
             trailing_separator: SeparatorTactic::Never,
             indent: indent,

tests/config/small_tabs.toml

@@ -6,7 +6,7 @@ newline_style = "Unix"
 fn_brace_style = "SameLineWhere"
 fn_return_indent = "WithArgs"
 fn_args_paren_newline = true
-fn_args_layout = "Tall"
+fn_args_density = "Tall"
 fn_arg_indent = "Visual"
 where_density = "Tall"
 where_indent = "Tabbed"

tests/source/fn-custom.rs

@@ -1,4 +1,4 @@
-// rustfmt-fn_args_layout: Compressed
+// rustfmt-fn_args_density: Compressed
 // Test some of the ways function signatures can be customised.
 
 // Test compressed layout of args.

tests/target/fn-custom.rs

@@ -1,4 +1,4 @@
-// rustfmt-fn_args_layout: Compressed
+// rustfmt-fn_args_density: Compressed
 // Test some of the ways function signatures can be customised.
 
 // Test compressed layout of args.