improve list formatting in 2020/ferguson1 markdown files

2020/ferguson2/recode.md

@@ -13,35 +13,20 @@ award](../ferguson1/prog.c) since it's also there and not enciphered.
 <a name="toc"></a>
 
 -   [What is recode and why is it recommended?](#recode)
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 -   [Options](#options)
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     *	[Protecting against the same I/O file](#samefile)
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     *	[File options parser limitation](#fileoptions)
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     *	[`-R` option validation?](#validation)
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 -   [Piping commands to recode](#pipingtorecode)
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 -   [Piping recode to the Enigma simulator](#pipingtoenigma)
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 -   [Manually test the recode program with the Enigma program](#manuallytest)
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 -   [Only write config file](#onlyconfig)
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 -   [Reusing a configuration](#reuseconfig)
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 -   [Write config file, read data file and pass to Enigma simulator](#passtoenigma)
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 -   [Piping directly to the Enigma code once (with randomised settings, saved)](#directlytoenigma)
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 -   [Usage conclusion](#conclusion)
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 -   [Example additions](#additions)
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 -   [Example uses](#exampleuses)
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 -   [Deliciously Enigmatic: Double-layered Chocolate Fudge Cake](#cake)