ruby/rubygem-optimist: Wrap README at 72 columns.

Signed-off-by: B. Watson <yalhcru@gmail.com>

ruby/rubygem-optimist/README

@@ -1,4 +1,4 @@
-Optimist is a commandline option parser for Ruby that just gets out of your
-way. One line of code per option is all you need to write. For that, you get a
-nice automatically-generated help page, robust option parsing, and sensible
-defaults for everything you don't specify.
+Optimist is a commandline option parser for Ruby that just gets out
+of your way. One line of code per option is all you need to write. For
+that, you get a nice automatically-generated help page, robust option
+parsing, and sensible defaults for everything you don't specify.