Auto merge of #13400 - ehuss:cargo-add-md, r=weihanglo

Fix markdown line break in cargo-add

This fixes a backslash line break in the cargo-add documentation. A future version of mdbook will adhere to the commonmark spec more closely, and this will end up showing as a literal backslash.

Author: bors

src/doc/man/cargo-add.md

@@ -11,7 +11,7 @@ cargo-add --- Add dependencies to a Cargo.toml manifest file
 
 `cargo add` [_options_] _crate_...\
 `cargo add` [_options_] `--path` _path_\
-`cargo add` [_options_] `--git` _url_ [_crate_...]\
+`cargo add` [_options_] `--git` _url_ [_crate_...]
 
 
 ## DESCRIPTION

src/doc/src/commands/cargo-add.md

@@ -7,7 +7,7 @@ cargo-add --- Add dependencies to a Cargo.toml manifest file
 
 `cargo add` [_options_] _crate_...\
 `cargo add` [_options_] `--path` _path_\
-`cargo add` [_options_] `--git` _url_ [_crate_...]\
+`cargo add` [_options_] `--git` _url_ [_crate_...]
 
 
 ## DESCRIPTION