Fix interpolated vars as `as`-aliases

src/runestone.jl

@@ -1106,7 +1106,13 @@ function format_as(ctx::Context, node::Node)
     # Alias-identifier
     idx += 1
     kid = kids[idx]
-    @assert kind(kid) === K"Identifier"
+    @assert kind(kid) in KSet"Identifier $"
+    if !is_leaf(kid)
+        @assert kind(first_leaf(kid)) !== K"Whitespace"
+    end
+    if kind(kid) === K"$"
+        @assert findlast(x -> x in KSet"quote macrocall", ctx.lineage_kinds) !== nothing
+    end
     accept_node!(ctx, kid)
     any_changes && push!(kids′, kid)
     # Reset stream

test/runtests.jl

@@ -825,6 +825,10 @@ end
                 "$(verb) A: a, c as d"
         end
     end
+    # Interpolated aliases in quotes and macrocalls
+    @test format_string("quote\nimport A as \$a\nend") == "quote\n    import A as \$a\nend"
+    @test format_string(":(import A as \$a)") == ":(import A as \$a)"
+    @test format_string("@eval import A as \$a") == "@eval import A as \$a"
 end
 
 @testset "spaces in export/public" begin