Merge pull request #666 from JuliaRobotics/maint/3Q20/betterwarn

better deprecation warning

Author: dehann

src/DistributedFactorGraphs.jl

@@ -306,8 +306,8 @@ if get(ENV, "DFG_USE_CGDFG", "") == "true"
 end
 
 function __init__()
-    @warn("BREAKING CHANGE v0.12: deprecating AbstractRelativeFactor, use AbstractRelativeRoots instead")
-    @warn("BREAKING CHANGE v0.12: deprecating AbstractRelativeFactorMinimize, use AbstractRelativeMinimize instead")
+    @warn("BREAKING CHANGE coming to DistributedFactorGraphs v0.12: deprecating AbstractRelativeFactor, use AbstractRelativeRoots instead")
+    @warn("BREAKING CHANGE coming to DistributedFactorGraphs v0.12: deprecating AbstractRelativeFactorMinimize, use AbstractRelativeMinimize instead")
 
     @require GraphPlot = "a2cc645c-3eea-5389-862e-a155d0052231" begin
         @info "Including Plots"