[AutoBuild] Add Documentation section to generated README (#1170)

The line about documentation currently appears in the `Bug Repors` section,
which looks odd.  Also, removed an extra newline.

Author: giordano

src/AutoBuild.jl

@@ -1340,8 +1340,9 @@ function build_jll_package(src_name::String,
         if is_yggdrasil()
             println(io, "[![deps](https://juliahub.com/docs/$(src_name)_jll/deps.svg)](https://juliahub.com/ui/Packages/$(src_name)_jll/$(Base.package_slug(BinaryBuilder.jll_uuid("$(src_name)_jll"), 5))?page=2)\n")
         end
-        print(io, """
-              This is an autogenerated package constructed using [`BinaryBuilder.jl`](https://github.com/JuliaPackaging/BinaryBuilder.jl).""")
+        println(io, """
+                This is an autogenerated package constructed using [`BinaryBuilder.jl`](https://github.com/JuliaPackaging/BinaryBuilder.jl).
+                """)
         if is_yggdrasil()
             println(io, """
                         The originating [`build_tarballs.jl`](https://github.com/JuliaPackaging/Yggdrasil/blob/$(yggdrasil_head())/$(ENV["PROJECT"])/build_tarballs.jl) script can be found on [`Yggdrasil`](https://github.com/JuliaPackaging/Yggdrasil/), the community build tree.")
@@ -1351,10 +1352,11 @@ function build_jll_package(src_name::String,
                         If you have any issue, please report it to the Yggdrasil [bug tracker](https://github.com/JuliaPackaging/Yggdrasil/issues).
                         """)
         end
-        println(io)
-        println(io)
-        println(io,"For more details about JLL packages and how to use them, see `BinaryBuilder.jl` [documentation](https://docs.binarybuilder.org/stable/jll/).")
-        println(io)
+        println(io, """
+                ## Documentation
+
+                For more details about JLL packages and how to use them, see `BinaryBuilder.jl` [documentation](https://docs.binarybuilder.org/stable/jll/).
+                """)
         if length(sources) > 0
             # `sources` can be empty, and it is for some HelloWorld examples
             println(io, """