gnu: Add rust-indoc-2.

* gnu/packages/crates-io.scm (rust-indoc-2): New variable.
(rust-indoc-1): Inherit from rust-indoc-2.

gnu/packages/crates-io.scm

@@ -29188,8 +29188,34 @@ Rust.")
 Rust.")
     (license license:expat)))
 
+(define-public rust-indoc-2
+  (package
+    (name "rust-indoc")
+    (version "2.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "indoc" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "142nzc474x1xgdzk057yv1yfrgxsk5a9zybbcwwrzp5ih65v8b4z"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-development-inputs
+       (("rust-rustversion" ,rust-rustversion-1)
+        ("rust-trybuild" ,rust-trybuild-1)
+        ("rust-unindent" ,rust-unindent-0.2))))
+    (home-page "https://github.com/dtolnay/indoc")
+    (synopsis "Indented document literals for Rust")
+    (description
+     "This crate provides a procedural macro for indented string literals.
+The @code{indoc!()} macro takes a multiline string literal and un-indents it
+at compile time so the leftmost non-space character is in the first column.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-indoc-1
   (package
+    (inherit rust-indoc-2)
     (name "rust-indoc")
     (version "1.0.7")
     (source
@@ -29199,21 +29225,13 @@ Rust.")
        (file-name (string-append name "-" version ".tar.gz"))
        (sha256
         (base32 "1qs42cn8rj7kdpmp1dlkzhv62rfmbx3ffwvsfw67zyq86jm1xaxd"))))
-    (build-system cargo-build-system)
     (arguments
      `(#:skip-build? #true
        #:cargo-inputs
        (("rust-unindent" ,rust-unindent-0.1))
        #:cargo-development-inputs
        (("rust-rustversion" ,rust-rustversion-1)
-        ("rust-trybuild" ,rust-trybuild-1))))
-    (home-page "https://github.com/dtolnay/indoc")
-    (synopsis "Indented document literals for Rust")
-    (description
-     "This crate provides a procedural macro for indented string literals.
-The @code{indoc!()} macro takes a multiline string literal and un-indents it
-at compile time so the leftmost non-space character is in the first column.")
-    (license (list license:expat license:asl2.0))))
+        ("rust-trybuild" ,rust-trybuild-1))))))
 
 (define-public rust-indoc-0.3
   (package