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-rw-r--r--lib/uri/mailto.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/uri/mailto.rb b/lib/uri/mailto.rb
index 765528fb7f..079340cf58 100644
--- a/lib/uri/mailto.rb
+++ b/lib/uri/mailto.rb
@@ -103,7 +103,7 @@ module URI
if tmp[:headers].kind_of?(Array)
tmp[:opaque] << tmp[:headers].collect { |x|
if x.kind_of?(Array)
- x[0] + '=' + x[1..-1].to_s
+ x[0] + '=' + x[1..-1].join
else
x.to_s
end