Fix empty functions with Unicode symbol names

src/runestone.jl

@@ -1348,7 +1348,9 @@ function indent_function_or_macro(ctx::Context, node::Node)
         @assert is_longform_anon_function(node)
     end
     sig_node = kids[sig_idx]
-    if kind(sig_node) === K"Identifier"
+    # Identifier for regular names but "not function call" for empty functions with Unicode
+    # symbols??
+    if kind(sig_node) === K"Identifier" || !(kind(sig_node) in KSet"call where :: tuple")
         # Empty function definition like `function f end`.
         # TODO: Make sure the spaces around are correct
         end_idx = findnext(x -> kind(x) === K"end", kids, sig_idx + 1)::Int

test/runtests.jl

@@ -464,6 +464,7 @@ end
         @test format_string("function f()\n$(sp)x\n$(sp)end") ==
             "function f()\n    x\nend"
         @test format_string("function f end") == "function f end"
+        @test format_string("function ∉ end") == "function ∉ end"
         # macro-end
         @test format_string("macro f()\n$(sp)x\n$(sp)end") ==
             "macro f()\n    x\nend"