Update cheatsheets

linux/unix2mac

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# unix2mac
+
+> Change Unix-style line endings to macOS-style.
+> Replaces LF with CR.
+> More information: <https://waterlan.home.xs4all.nl/dos2unix.html>.
+
+- Change the line endings of a file:
+
+`unix2mac {{path/to/file}}`
+
+- Create a copy with macOS-style line endings:
+
+`unix2mac -n {{path/to/unix_file}} {{path/to/mac_file}}`