Removal pass for anonymous parameters

Removes occurences of anonymous parameters from the
rustc codebase, as they are to be deprecated.

See issue #41686 and RFC 1685.

src/librustdoc/clean/mod.rs

@@ -503,7 +503,7 @@ impl<'a> Iterator for ListAttributesIter<'a> {
 
 pub trait AttributesExt {
     /// Finds an attribute as List and returns the list of attributes nested inside.
-    fn lists<'a>(&'a self, &'a str) -> ListAttributesIter<'a>;
+    fn lists<'a>(&'a self, name: &'a str) -> ListAttributesIter<'a>;
 }
 
 impl AttributesExt for [ast::Attribute] {
@@ -518,7 +518,7 @@ impl AttributesExt for [ast::Attribute] {
 
 pub trait NestedAttributesExt {
     /// Returns whether the attribute list contains a specific `Word`
-    fn has_word(self, &str) -> bool;
+    fn has_word(self, word: &str) -> bool;
 }
 
 impl<I: IntoIterator<Item=ast::NestedMetaItem>> NestedAttributesExt for I {

src/librustdoc/core.rs

@@ -89,7 +89,7 @@ impl<'a, 'tcx> DocContext<'a, 'tcx> {
 }
 
 pub trait DocAccessLevels {
-    fn is_doc_reachable(&self, DefId) -> bool;
+    fn is_doc_reachable(&self, did: DefId) -> bool;
 }
 
 impl DocAccessLevels for AccessLevels<DefId> {

src/librustdoc/html/highlight.rs

@@ -114,7 +114,7 @@ pub enum Class {
 pub trait Writer {
     /// Called when we start processing a span of text that should be highlighted.
     /// The `Class` argument specifies how it should be highlighted.
-    fn enter_span(&mut self, Class) -> io::Result<()>;
+    fn enter_span(&mut self, _: Class) -> io::Result<()>;
 
     /// Called at the end of a span of highlighted text.
     fn exit_span(&mut self) -> io::Result<()>;
@@ -131,7 +131,11 @@ pub trait Writer {
     /// ```
     /// The latter can be thought of as a shorthand for the former, which is
     /// more flexible.
-    fn string<T: Display>(&mut self, T, Class, Option<&TokenAndSpan>) -> io::Result<()>;
+    fn string<T: Display>(&mut self,
+                          text: T,
+                          klass: Class,
+                          tas: Option<&TokenAndSpan>)
+                          -> io::Result<()>;
 }
 
 // Implement `Writer` for anthing that can be written to, this just implements