rollup merge of #20708: aturon/new-int-modules

Conflicts:
	src/libserialize/lib.rs

src/libstd/io/mod.rs

@@ -1783,9 +1783,8 @@ pub struct UnstableFileStat {
 }
 
 
-// NOTE(stage0): change this one last #[doc=..] to /// after the next snapshot
 bitflags! {
-    #[doc = "A set of permissions for a file or directory is represented by a set of"]
+    /// A set of permissions for a file or directory is represented by a set of
     /// flags which are or'd together.
     flags FilePermission: u32 {
         const USER_READ     = 0o400,

src/libstd/io/process.rs

@@ -395,13 +395,6 @@ impl Command {
     }
 }
 
-#[cfg(stage0)]
-impl fmt::Show for Command {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::String::fmt(self, f)
-    }
-}
-
 impl fmt::String for Command {
     /// Format the program and arguments of a Command for display. Any
     /// non-utf8 data is lossily converted using the utf8 replacement