fix: ensure no trailing space after colon token in conditional type (#522)

Author: dsherret

src/generation/generate.rs

@@ -5332,7 +5332,8 @@ fn gen_conditional_type<'a>(node: &'a TsConditionalType, context: &mut Context<'
       let mut items = PrintItems::new();
       items.extend(question_comment_items.leading_line);
       if question_position == OperatorPosition::NextLine {
-        items.push_str("? ");
+        items.push_str("?");
+        items.push_signal(Signal::SpaceIfNotTrailing);
       }
       items.extend(ir_helpers::new_line_group(gen_node(node.true_type.into(), context)));
       if colon_position == OperatorPosition::SameLine {
@@ -5375,7 +5376,8 @@ fn gen_conditional_type<'a>(node: &'a TsConditionalType, context: &mut Context<'
     items.push_info(before_false_ln);
     items.extend(colon_comment_items.leading_line);
     if colon_position == OperatorPosition::NextLine {
-      items.push_str(": ");
+      items.push_str(":");
+      items.push_signal(Signal::SpaceIfNotTrailing);
     }
     items.extend(ir_helpers::new_line_group(gen_node(node.false_type.into(), context)));
     items

tests/specs/issues/issue0516.txt

@@ -0,0 +1,37 @@
+~~ indentWidth: 2 ~~
+== should not have trailing space ==
+type Type<T = any> = T extends never ? never
+    :
+        & { ephemeral?: T }
+        & (
+            | Object_Type
+            | Union_Type
+            | Intersection_Type
+            | Enum_Member_Type
+            | Generic_Type
+            | Primitive
+            | Enum_Type
+            | Array_Type
+            | Tuple_Type
+            | Any_Type
+            | Custom_Type
+        )
+    ;
+
+[expect]
+type Type<T = any> = T extends never ? never
+  :
+    & { ephemeral?: T }
+    & (
+      | Object_Type
+      | Union_Type
+      | Intersection_Type
+      | Enum_Member_Type
+      | Generic_Type
+      | Primitive
+      | Enum_Type
+      | Array_Type
+      | Tuple_Type
+      | Any_Type
+      | Custom_Type
+    );