doc: fix version stamp for TeX files

This fixes a regression introduced in
3d57b240ab1fd038b3a41fe2042dc9a0544ea53e.
Elaborate manual on matching (dereference patterns, lvalue/rvalue matching)

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
doc: fix rust.md fallout
doc: fix dangling links in rust.md

Fixes #11559 (not that the manual couldn't use a review).
auto merge of #11619 : adridu59/rust/patch-md, r=cmr

Noticeably necroes #10892.
Also closes #11559.

r? @alexcrichton