[ruby/pp] Fix pretty printing a Data subclass instance when the subclass is anonymous

* It would be "#<data  a=42>" (double space) instead of "#<data a=42>" (like #inspect).

https://github.com/ruby/pp/commit/bed72bfcb8

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/pp.rb b/lib/pp.rb
index 5e5fd06cae..fb7aa7b41c 100644
--- a/lib/pp.rb
+++ b/lib/pp.rb
@@ -422,7 +422,9 @@ end
 
 class Data # :nodoc:
   def pretty_print(q) # :nodoc:
-    q.group(1, sprintf("#<data %s", PP.mcall(self, Kernel, :class).name), '>') {
+    class_name = PP.mcall(self, Kernel, :class).name
+    class_name = " #{class_name}" if class_name
+    q.group(1, "#<data#{class_name}", '>') {
       q.seplist(PP.mcall(self, Kernel, :class).members, lambda { q.text "," }) {|member|
         q.breakable
         q.text member.to_s