Test fixes from rollup

Closes #13394 (sync: remove unsafe and add Send+Share to Deref (enabled by autoderef vtables))
Closes #13389 (Made libflate functions return Options instead of outright failing)
Closes #13388 (doc: Document flavorful variations of paths)
Closes #13387 (Register new snapshots)
Closes #13386 (std: Add more docs for ptr mod)
Closes #13384 (Tweak crate loading to load less metadata)
Closes #13382 (fix ~ZeroSizeType rvalues)
Closes #13378 (Update tidy script, replace XXX with FIXME)
Closes #13377 (std: User a smaller stdin buffer on windows)
Closes #13369 (Fix spelling errors in comments.)
Closes #13314 (Made 'make install' include libs for additional targets)
Closes #13278 (std: make vec!() macro handle a trailing comma)
Closes #13276 (Add test for #11881)

Author: alexcrichton

src/libsyntax/ext/expand.rs

@@ -1019,14 +1019,6 @@ mod test {
         fn load_crate(&mut self, _: &ast::ViewItem) -> MacroCrate {
             fail!("lolwut")
         }
-
-        fn get_exported_macros(&mut self, _: ast::CrateNum) -> Vec<~str> {
-            fail!("lolwut")
-        }
-
-        fn get_registrar_symbol(&mut self, _: ast::CrateNum) -> Option<~str> {
-            fail!("lolwut")
-        }
     }
 
     // these following tests are quite fragile, in that they don't test what