Update cheatsheets

tldr/nix-instantiate

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# nix-instantiate
+
+> Create store derivations from nix expressions.
+> See also: `nix eval`.
+> More information: <https://nix.dev/manual/nix/latest/command-ref/nix-instantiate.html>.
+
+- Instantiate a store derivation from a Nix file:
+
+`nix-instantiate {{path/to/file.nix}}`
+
+- Evaluate an expression:
+
+`nix-instantiate --eval {{[-E|--expr]}} {{expression}}`
+
+- Evaluate with machine readable output:
+
+`nix-instantiate --eval --xml {{[-E|--expr]}} {{expression}}`
+
+- Raw output, output of the function must be a string:
+
+`nix-instantiate --eval --raw {{[-E|--expr]}} {{expression}}`
+
+- Evaluate a Nix expression from a specified file:
+
+`nix-instantiate --eval {{path/to/file.nix}}`

tldr/ptghci

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ptghci
+
+> Interactive Haskell REPL with syntax highlighting, multiline editing, and real-time type display.
+> See also: `ghci`.
+> More information: <https://github.com/litxio/ptghci>.
+
+- Start an interactive session:
+
+`ptghci`
+
+- Start an interactive session and load a Haskell file:
+
+`ptghci {{path/to/file.hs}}`
+
+- [Interactive] List past commands from the current session:
+
+`%past`
+
+- [Interactive] List past commands including previous sessions:
+
+`%past -n {{number}}`
+
+- [Interactive] Re-run specific commands from history:
+
+`%rerun {{3,4-5,p8}}`
+
+- [Interactive] Search Hoogle for an identifier:
+
+`%hoogle {{identifier}}`
+
+- [Interactive] Change the syntax highlighting style:
+
+`%style {{style_name}}`