Issue #11793 has been updated by William Burnson.

Description updated

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Bug #11793: puts 'ab'.gsub('a', '\\+') - unexpected output
https://bugs.ruby-lang.org/issues/11793#change-55386

* Author: William Burnson
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-darwin15]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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Test case:
~~~
puts 'ab'.gsub('a', '\\+')
~~~
Expected output:
~~~
\+b
~~~
Actual output:
~~~
b
~~~
The way I understand gsub(pattern, replacement) when used with two string arguments is that it will perform a literal replacement, so it is quite unexpected that substituting with \+ removes the pattern entirely.

Doc: http://ruby-doc.org/core-2.2.3/String.html#method-i-gsub




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