Fix spaces around assignment with non-trivia operators.

src/runestone.jl

@@ -282,7 +282,7 @@ function spaces_around_operators(ctx::Context, node::JuliaSyntax.GreenNode)
 end
 
 function spaces_around_assignments(ctx::Context, node::JuliaSyntax.GreenNode)
-    if !(is_assignment(node) && !JuliaSyntax.is_trivia(node))
+    if !(is_assignment(node) && !is_leaf(node) )
         return nothing
     end
     # for-loop nodes are of kind K"=" even when `in` or `∈` is used so we need to

test/runtests.jl

@@ -173,6 +173,9 @@ end
         op == "in" && sp == "" && continue
         @test format_string("for i$(sp)$(op)$(sp)1:10\nend\n") == "for i $(op) 1:10\nend\n"
     end
+    # Quoted assignment operators
+    @test format_string(":(=)") == ":(=)"
+    @test format_string(":(+=)") == ":(+=)"
 end
 
 @testset "whitespace around <: and >:, no whitespace around ::" begin