Test fixes from rolling up PRs

Closes #12803 (std: Relax an assertion in oneshot selection) r=brson
Closes #12818 (green: Fix a scheduler assertion on yielding) r=brson
Closes #12819 (doc: discuss try! in std::io) r=alexcrichton
Closes #12820 (Use generic impls for `Hash`) r=alexcrichton
Closes #12826 (Remove remaining nolink usages) r=alexcrichton
Closes #12835 (Emacs: always jump the cursor if needed on indent) r=brson
Closes #12838 (Json method cleanup) r=alexcrichton
Closes #12843 (rustdoc: whitelist the headers that get a § on hover) r=alexcrichton
Closes #12844 (docs: add two unlisted libraries to the index page) r=pnkfelix
Closes #12846 (Added a test that checks that unary structs can be mutably borrowed) r=sfackler
Closes #12847 (mk: Fix warnings about duplicated rules) r=nmatsakis

Author: alexcrichton

mk/docs.mk

@@ -148,8 +148,8 @@ endef
 $(foreach docname,$(PDF_DOCS),$(eval $(call DEF_SHOULD_BUILD_PDF_DOC,$(docname))))
 
 doc/footer.tex: $(D)/footer.inc | doc/
-	@$$(call E, pandoc: $$@)
-	$$(CFG_PANDOC) --from=html --to=latex $$< --output=$$@
+	@$(call E, pandoc: $@)
+	$(CFG_PANDOC) --from=html --to=latex $< --output=$@
 
 define DEF_DOC
 

src/test/run-pass/issue-11267.rs

@@ -20,6 +20,6 @@ fn do_something_with(a : &mut Iterator<int>) {
     println!("{}", a.next())
 }
 
-fn main() {
+pub fn main() {
     do_something_with(&mut Empty);
-}
+}