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@@ -263,7 +263,7 @@ this case we're basing our new image on an Ubuntu 14.04 image.
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Next we use the `MAINTAINER` instruction to specify who maintains our new image.
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-Lastly, we've specified three `RUN` instructions. A `RUN` instruction executes
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+Lastly, we've specified two `RUN` instructions. A `RUN` instruction executes
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a command inside the image, for example installing a package. Here we're
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updating our APT cache, installing Ruby and RubyGems and then installing the
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Sinatra gem.
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James Turnbull