Fix #6280 - puppetdoc crashing on string interpolation

The following manifest was crashing puppetdoc:
  class test {
     include "test::$operatingsystem"
  }

Because the quoted string is "rendered" as a concat AST, which in turn
ended being an array when entering RDoc.

Signed-off-by: Brice Figureau <brice-puppet@daysofwonder.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/puppet/parser/ast/leaf.rb b/lib/puppet/parser/ast/leaf.rb
index fcdd219d7..77617e992 100644
--- a/lib/puppet/parser/ast/leaf.rb
+++ b/lib/puppet/parser/ast/leaf.rb
@@ -67,7 +67,7 @@ class Puppet::Parser::AST
     end
 
     def to_s
-      "concat(#{@value.join(',')})"
+      "#{@value.map { |s| s.to_s.gsub(/^"(.*)"$/, '\1') }.join}"
     end
   end