Step by Step solution about How to resolve the algorithm Rosetta Code/Fix code tags step by step in the Mathematica/Wolfram Language programming language

The provided code is written in Wolfram language. It takes an input file called "wikisource.txt" and performs two string replacement operations on its contents. The resulting modified text is then saved in a new file called "converted.txt".

Here's a step-by-step explanation of the code:

Replace </ with </lang>:

{"</"~~Shortest[__]~~">"->"</lang>"}

This part of the code replaces all occurrences of </ followed by any number of characters (represented by the wildcard __) and ending with > with </lang>. This effectively replaces the closing tags of XML or HTML elements with the closing tag for a Wolfram Language expression.

Replace <code |<with<lang `:

{"(<code "|"<")~~Shortest[x__]~~">"->"<lang "~~ x~~">"}

This part of the code replaces all occurrences of either <code or < followed by any number of characters (represented by the wildcard x__) and ending with > with <lang followed by the captured characters and a closing >. This effectively replaces the start of code blocks or other delimited text with the start of a Wolfram Language expression.

The entire code is then used as the argument to the StringReplace function, which takes an input string and applies the specified replacement rules to it. The result of the replacements is then written to the "converted.txt" file using the >> output operator.

StringReplace[Import["wikisource.txt"],
{"</"~~Shortest[__]~~">"->"</lang>",
("<code "|"<")~~Shortest[x__]~~">"->"<lang "~~ x~~">"}
]>>"converted.txt"