From e077a910b62ef448380c3f9607d740e5c98100b3 Mon Sep 17 00:00:00 2001
From: Kazuhiro NISHIYAMA <zn@mbf.nifty.com>
Date: Sun, 9 Feb 2020 13:39:24 +0900
Subject: [PATCH] Fix message of ExceptionForMatrix::ErrOperationNotDefined

```
 % RBENV_VERSION=2.6.5 ruby -r matrix -e 'Vector[1]*Vector[2] rescue p($!)'
 #<ExceptionForMatrix::ErrOperationNotDefined: Operation(*) can't be defined: Vector op Vector>
 % RBENV_VERSION=2.7.0 ruby -r matrix -e 'Vector[1]*Vector[2] rescue p($!)'
 #<ExceptionForMatrix::ErrOperationNotDefined: Operation(*) can\'t be defined: Vector op Vector>
 % RBENV_VERSION=master ruby -r matrix -e 'Vector[1]*Vector[2] rescue p($!)'
 #<ExceptionForMatrix::ErrOperationNotDefined: Operation(*) can't be defined: Vector op Vector>
```
---
 lib/matrix.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/matrix.rb b/lib/matrix.rb
index fc0e8ef2f7..81e3f596ca 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -38,7 +38,7 @@ module ExceptionForMatrix # :nodoc:
   class ErrOperationNotDefined < StandardError
     def initialize(vals)
       if vals.is_a?(Array)
-        super("Operation(#{vals[0]}) can\\'t be defined: #{vals[1]} op #{vals[2]}")
+        super("Operation(#{vals[0]}) can't be defined: #{vals[1]} op #{vals[2]}")
       else
         super(vals)
       end