Fix rustdoc's formatting of lifetimes

rustdoc was previously formatting lifetimes with two apostrophes, presumably
as a result of #14797.

src/librustdoc/clean/mod.rs

@@ -617,7 +617,7 @@ fn clean(&self) -> Lifetime {
 impl Clean<Option<Lifetime>> for ty::Region {
     fn clean(&self) -> Option<Lifetime> {
         match *self {
-            ty::ReStatic => Some(Lifetime("static".to_string())),
+            ty::ReStatic => Some(Lifetime("'static".to_string())),
             ty::ReLateBound(_, ty::BrNamed(_, name)) =>
                 Some(Lifetime(token::get_name(name).get().to_string())),
             ty::ReEarlyBound(_, _, _, name) => Some(Lifetime(name.clean())),

src/librustdoc/html/format.rs

@@ -91,7 +91,6 @@ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 
 impl fmt::Show for clean::Lifetime {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        try!(f.write("'".as_bytes()));
         try!(f.write(self.get_ref().as_bytes()));
         Ok(())
     }