Fix show(::IO, ::BenchmarkResults); don't print directly to stdout (#118)

Co-authored-by: Curtis Vogt <curtis.vogt@gmail.com>

Author: tkf

src/benchmarkresults.jl

@@ -42,7 +42,7 @@ function Base.show(io::IO, results::BenchmarkResults)
     ioc = IOContext(iob)
     show(ioc, MIME("text/plain"), results.benchmarkgroup)
     println(io,   "    BenchmarkGroup:")
-    print(join("        " .* split(String(take!(iob)), "\n"), "\n"))
+    print(io, join("        " .* split(String(take!(iob)), "\n"), "\n"))
 end
 
 """

test/runtests.jl

@@ -56,6 +56,8 @@ end
     @test PkgBenchmark.name(results) == "PkgBenchmark"
     @test Dates.Year(PkgBenchmark.date(results)) == Dates.Year(now())
     export_markdown(stdout, results)
+    str = sprint(show, "text/plain", results)
+    @test occursin(r"\d-element .*\.BenchmarkGroup", str)
 end
 
 @testset "objectpath/loadobject" begin