Pretty-print $crate::foo::bar as ::foo::bar.

Author: jseyfried

src/librustc/hir/print.rs

@@ -1647,7 +1647,7 @@ impl<'a> State<'a> {
             if i > 0 {
                 word(&mut self.s, "::")?
             }
-            if segment.name != keywords::CrateRoot.name() {
+            if segment.name != keywords::CrateRoot.name() && segment.name != "$crate" {
                 self.print_name(segment.name)?;
                 self.print_path_parameters(&segment.parameters, colons_before_params)?;
             }
@@ -1674,7 +1674,7 @@ impl<'a> State<'a> {
                     if i > 0 {
                         word(&mut self.s, "::")?
                     }
-                    if segment.name != keywords::CrateRoot.name() {
+                    if segment.name != keywords::CrateRoot.name() && segment.name != "$crate" {
                         self.print_name(segment.name)?;
                         self.print_path_parameters(&segment.parameters, colons_before_params)?;
                     }

src/libsyntax/print/pprust.rs

@@ -2351,7 +2351,8 @@ impl<'a> State<'a> {
             if i > 0 {
                 try!(word(&mut self.s, "::"))
             }
-            if segment.identifier.name != keywords::CrateRoot.name() {
+            if segment.identifier.name != keywords::CrateRoot.name() &&
+               segment.identifier.name != "$crate" {
                 try!(self.print_ident(segment.identifier));
                 if let Some(ref parameters) = segment.parameters {
                     try!(self.print_path_parameters(parameters, colons_before_params));

src/test/pretty/issue-4264.pp

@@ -39,7 +39,7 @@
 
 
 
-                  (($crate::fmt::format as
+                  ((::fmt::format as
                        fn(std::fmt::Arguments<'_>) -> std::string::String {std::fmt::format})(((<::std::fmt::Arguments>::new_v1
                                                                                                    as
                                                                                                    fn(&[&str], &[std::fmt::ArgumentV1<'_>]) -> std::fmt::Arguments<'_> {std::fmt::Arguments<'_>::new_v1})(({