Anonymous committed ad1873d

Correct some typos in P4N5.

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 <h3 id="pod-demo-formatting-codes">Formatting Codes</h3>
-One can use some formatting code:
+One can use some formatting codes:
 <tt>E&lt;lt&gt;</tt> , <tt>E&lt;gt&gt;</tt> , <tt>E&lt;htmlname&gt;</tt>,
 etc. are escapes.
 One should note that one can combine several styles at once using 


 The code should be structured to be as self-documenting as possible. 
 For example, instead of documenting what a block of code is doing, one 
-should extract a subroutine with an name that conveys the intention. 
+should extract a subroutine with a name that conveys the intention.