Update to newer version of mdbook(2)

Author: James Munns

Cargo.lock

@@ -1364,7 +1364,7 @@ dependencies = [
 
 [[package]]
 name = "mdbook"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ammonia 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2179,7 +2179,7 @@ version = "0.1.0"
 dependencies = [
  "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "mdbook 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "mdbook 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mdbook 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3681,7 +3681,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum markup5ever 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "bfedc97d5a503e96816d10fedcd5b42f760b2e525ce2f7ec71f6a41780548475"
 "checksum matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08"
 "checksum mdbook 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "b55b93934e73452acf4f6335c2bd1018789e5409d38a6704906bb91b4a3d83a4"
-"checksum mdbook 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "ccc65c399ee38d8a3b26e4daa19cd68f9d58d253706c1c07bb44fd2b3fdb5143"
+"checksum mdbook 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "0ba0d44cb4089c741b9a91f3e5218298a40699c2f3a070a85014eed290c60819"
 "checksum memchr 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0a3eb002f0535929f1199681417029ebea04aadc0c7a4224b46be99c7f5d6a16"
 "checksum memmap 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2ffa2c986de11a9df78620c01eeaaf27d94d3ff02bf81bfcca953102dd0c6ff"
 "checksum memoffset 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0f9dc261e2b62d7a622bf416ea3c5245cdd5d9a7fcc428c0d06804dfce1775b3"

src/tools/rustbook/Cargo.toml

@@ -10,7 +10,7 @@ clap = "2.25.0"
 
 [dependencies.mdbook_2]
 package = "mdbook"
-version = "0.2.2"
+version = "0.2.3"
 default-features = false
 features = ["search"]