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fix the initializer block example and clarify

clarify that the contents of the block is expected to return a string. the previous example executed puts and the initializer got nothing.

also, made it consistent with the single-line example to be more clear as to what's going on
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commit 18f9d46d4ff0c9be6f4561d06d66f4c55b81731c 1 parent 6f9baae
@cpg cpg authored
Showing with 2 additions and 2 deletions.
  1. +2 −2 guides/source/generators.md
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4 guides/source/generators.md
@@ -589,11 +589,11 @@ Creates an initializer in the `config/initializers` directory of the application
initializer "begin.rb", "puts 'this is the beginning'"
```
-This method also takes a block:
+This method also takes a block, expected to return a string:
```ruby
initializer "begin.rb" do
- puts "Almost done!"
+ "puts 'this is the beginning'"
end
```
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