doc: improve opam file doc

Signed-off-by: Ali Caglayan <alizter@gmail.com>

dune-project

@@ -34,19 +34,19 @@
   (js_of_ocaml-compiler (< 3.6.0))
   (jbuilder (= transition)))
  (description "
-dune is a build system that was designed to simplify the release of
+Dune is a build system that was designed to simplify the release of
 Jane Street packages. It reads metadata from \"dune\" files following a
 very simple s-expression syntax.
 
-dune is fast, has very low-overhead, and supports parallel builds on
+Dune is fast, has very low-overhead, and supports parallel builds on
 all platforms. It has no system dependencies; all you need to build
 dune or packages using dune is OCaml. You don't need make or bash
 as long as the packages themselves don't use bash explicitly.
 
-dune supports multi-package development by simply dropping multiple
-repositories into the same directory.
+Dune is composable; supporting multi-package development by simply
+dropping multiple repositories into the same directory.
 
-It also supports multi-context builds, such as building against
+Dune also supports multi-context builds, such as building against
 several opam roots/switches simultaneously. This helps maintaining
 packages across several versions of OCaml and gives cross-compilation
 for free.

dune.opam

@@ -3,19 +3,19 @@ opam-version: "2.0"
 synopsis: "Fast, portable, and opinionated build system"
 description: """
 
-dune is a build system that was designed to simplify the release of
+Dune is a build system that was designed to simplify the release of
 Jane Street packages. It reads metadata from "dune" files following a
 very simple s-expression syntax.
 
-dune is fast, has very low-overhead, and supports parallel builds on
+Dune is fast, has very low-overhead, and supports parallel builds on
 all platforms. It has no system dependencies; all you need to build
 dune or packages using dune is OCaml. You don't need make or bash
 as long as the packages themselves don't use bash explicitly.
 
-dune supports multi-package development by simply dropping multiple
-repositories into the same directory.
+Dune is composable; supporting multi-package development by simply
+dropping multiple repositories into the same directory.
 
-It also supports multi-context builds, such as building against
+Dune also supports multi-context builds, such as building against
 several opam roots/switches simultaneously. This helps maintaining
 packages across several versions of OCaml and gives cross-compilation
 for free.