Update .gitignore

.gitignore

@@ -1,30 +1,35 @@
 
-# Created by https://www.gitignore.io/api/rust,vim
+# Created by https://www.toptal.com/developers/gitignore/api/rust,vim
+# Edit at https://www.toptal.com/developers/gitignore?templates=rust,vim
 
 ### Rust ###
 # Generated by Cargo
 # will have compiled files and executables
 /target/
 
 # Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here http://doc.crates.io/guide.html#cargotoml-vs-cargolock
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
 Cargo.lock
 
-# These are backup files generated by rustfmt
-**/*.rs.bk
-
 ### Vim ###
-# swap
+# Swap
 [._]*.s[a-v][a-z]
+!*.svg  # comment out if you don't need vector files
 [._]*.sw[a-p]
-[._]s[a-v][a-z]
+[._]s[a-rt-v][a-z]
+[._]ss[a-gi-z]
 [._]sw[a-p]
-# session
+
+# Session
 Session.vim
-# temporary
+Sessionx.vim
+
+# Temporary
 .netrwhist
 *~
-# auto-generated tag files
+# Auto-generated tag files
 tags
+# Persistent undo
+[._]*.un~
 
-# End of https://www.gitignore.io/api/rust,vim
+# End of https://www.toptal.com/developers/gitignore/api/rust,vim