Fix an edgecase in operator chains with newlines hidden inside

src/runestone.jl

@@ -225,6 +225,15 @@ function spaces_around_x(ctx::Context, node::JuliaSyntax.GreenNode, is_x::F) whe
                     end
                     push!(children′, child′)
                 end
+            elseif JuliaSyntax.haschildren(child) &&
+                    JuliaSyntax.kind(first_leaf(child)) === K"NewlineWs"
+                # NewlineWs have to be accepted as is
+                @info "     ... childs first leaf is NewlineWs I'll take it"
+                accept_node!(ctx, child)
+                any_changes && push!(children′, child)
+                looking_for_whitespace = JuliaSyntax.kind(last_leaf(child)) !== K"Whitespace"
+                @assert !is_x(child)::Bool
+                looking_for_x = true
             else
                 # Not a whitespace node, insert one
                 any_changes = true

test/runtests.jl

@@ -146,6 +146,9 @@ end
         # Edgecase when using whitespace from the next leaf but the call chain continues
         # after with more children.
         @test format_string("$(sp)z$(sp)+$(sp)2x$(sp)+$(sp)z$(sp)") == "$(sp)z + 2x + z$(sp)"
+        # Edgecase where the NewlineWs ends up inside the second call in a chain
+        @test format_string("$(sp)a$(sp)\\$(sp)b$(sp)≈ $(sp)\n$(sp)c$(sp)\\$(sp)d$(sp)") ==
+            "$(sp)a \\ b ≈\n$(sp)c \\ d$(sp)"
     end
 end