[nongnu] elpa/rust-mode updated (e2bb3b090e -> 384051e23f)

[ELPA Syncer]

elpasync pushed a change to branch elpa/rust-mode.

      from  e2bb3b090e Merge pull request #477 from imichael2e2/master
       new  42ba58df6c Simplify and correct angle bracket propertizing and 
macro argument detection.
       new  07c4a3a5d7 Merge pull request #467 from jimblandy/in-macro
       new  081e62d08c Support envrc for rustfmt
       new  384051e23f Merge pull request #470 from amesgen/envrc-rustfmt


Summary of changes:
 rust-mode-tests.el |  72 ++++++-------------
 rust-mode.el       | 203 ++++++++++++++++++++---------------------------------
 rust-rustfmt.el    |  88 +++++++++++------------
 3 files changed, 144 insertions(+), 219 deletions(-)