Add Block Comments as a ruby til.

README.md

@@ -197,6 +197,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 
 - [Are They All True?](ruby/are-they-all-true.md)
 - [Assoc For Hashes](ruby/assoc-for-hashes.md)
+- [Block Comments](ruby/block-comments.md)
 - [Colorful Output With MiniTest](ruby/colorful-output-with-minitest.md)
 - [Comparing Class Hierarchy Relationships](ruby/comparing-class-hierarchy-relationships.md)
 - [Comparing Arrays In RSpec](ruby/comparing-arrays-in-rspec.md)

ruby/block-comments.md

@@ -0,0 +1,16 @@
+# Block Comments
+
+Ruby supports (ugly) block comments. They look like this:
+
+```ruby
+=begin
+This is a block comment.
+
+I can put whatever I want in here.
+=end
+def do_something
+  ...
+end
+```
+
+[source](http://stackoverflow.com/questions/536760/block-commenting-in-ruby)