Update cheatsheets

ocaml

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ocaml
+
+> The OCaml repl (read-evaluate-print-loop).
+> Interprets Ocaml commands.
+> More information: <https://ocaml.org>.
+
+- Read OCaml commands from the user and execute them:
+
+`ocaml`
+
+- Read OCaml commands from a file and execute them:
+
+`ocaml {{path/to/file.ml}}`
+
+- Run OCaml script with modules:
+
+`ocaml {{module1}} {{module2}} {{path/to/file.ml}}`