Update the docstring for export_markdown

src/benchmarkresults.jl

@@ -85,11 +85,17 @@ function readresults(file::String)
 end
 
 """
-    export_markdown(file::String, results::Union{BenchmarkResults, BenchmarkJudgement})
-    export_markdown(io::IO,       results::Union{BenchmarkResults, BenchmarkJudgement})
+    export_markdown(file::String, results::BenchmarkResults)
+    export_markdown(io::IO,       results::BenchmarkResults)
+    export_markdown(file::String, results::BenchmarkJudgement; export_invariants=false)
+    export_markdown(io::IO,       results::BenchmarkJudgement; export_invariants=false)
 
 Writes the `results` to `file` or `io` in markdown format.
 
+When exporting a `BenchmarkJudgement`, by default only the results corresponding to
+possible regressions or improvements will be included. To also export the invariant
+results, set `export_invariants=true`.
+
 See also: [`BenchmarkResults`](@ref), [`BenchmarkJudgement`](@ref)
 """
 function export_markdown(file::String, results::BenchmarkResults)