revert r37326 "remove string literal concatenation"

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37328 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/matrix.rb b/lib/matrix.rb
index f4e3b316f6..00fa762da6 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -1404,7 +1404,8 @@ class Matrix
       begin
         ret = obj.__send__(meth)
       rescue Exception => e
-        raise TypeError, "Coercion error: #{obj.inspect}.#{meth} => #{cls} failed:\n(#{e.message})"
+        raise TypeError, "Coercion error: #{obj.inspect}.#{meth} => #{cls} failed:\n" \
+                         "(#{e.message})"
       end
       raise TypeError, "Coercion error: obj.#{meth} did NOT return a #{cls} (was #{ret.class})" unless ret.kind_of? cls
       ret