y-temp4 · October 19, 2016 21:05
diff --git a/file0.txt b/file0.txt
 $ pry
 Sorry, you can't use Pry without Readline or a compatible library.
 Possible solutions:
 * Rebuild Ruby with Readline support using `--with-readline`
 * Use the rb-readline gem, which is a pure-Ruby port of Readline
 * Use the pry-coolline gem, a pure-ruby alternative to Readline
 ...
diff --git a/file1.txt b/file1.txt
 $ gem install rb-readline
 Fetching: rb-readline-0.5.3.gem (100%)
 Successfully installed rb-readline-0.5.3
 Parsing documentation for rb-readline-0.5.3
 Installing ri documentation for rb-readline-0.5.3
 Done installing documentation for rb-readline after 3 seconds
 1 gem installed
diff --git a/file2.txt b/file2.txt
 $ rbenv install -f 2.3.1
diff --git a/file3.txt b/file3.txt
 $ pry
 [1] pry(main)>
	$ pry
	Sorry, you can't use Pry without Readline or a compatible library.
	Possible solutions:
	* Rebuild Ruby with Readline support using `--with-readline`
	* Use the rb-readline gem, which is a pure-Ruby port of Readline
	* Use the pry-coolline gem, a pure-ruby alternative to Readline
	...
	$ gem install rb-readline
	Fetching: rb-readline-0.5.3.gem (100%)
	Successfully installed rb-readline-0.5.3
	Parsing documentation for rb-readline-0.5.3
	Installing ri documentation for rb-readline-0.5.3
	Done installing documentation for rb-readline after 3 seconds
	1 gem installed