Update cheatsheets

pup

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pup
+
+> Command-line HTML parsing tool.
+> More information: <https://github.com/ericchiang/pup>.
+
+- Transform a raw HTML file into a cleaned, indented, and colored format:
+
+`cat {{index.html}} | pup --color`
+
+- Filter HTML by element tag name:
+
+`cat {{index.html}} | pup '{{tag}}'`
+
+- Filter HTML by id:
+
+`cat {{index.html}} | pup '{{div#id}}'`
+
+- Filter HTML by attribute value:
+
+`cat {{index.html}} | pup '{{input[type="text"]}}'`
+
+- Print all text from the filtered HTML elements and their children:
+
+`cat {{index.html}} | pup '{{div}} text{}'`
+
+- Print HTML as JSON:
+
+`cat {{index.html}} | pup '{{div}} json{}'`