Update cheatsheets

osx/dot_clean

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+---
+syntax: markdown
+tags: [tldr, osx]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dot_clean
+
+> Merge ._* files with corresponding native files.
+> More information: <https://keith.github.io/xcode-man-pages/dot_clean.1.html>.
+
+- Merge all `._*` files recursively:
+
+`dot_clean {{path/to/directory}}`
+
+- Don't recursively merge all `._*` in a directory (flat merge):
+
+`dot_clean -f {{path/to/directory}}`
+
+- Merge and delete all `._*` files:
+
+`dot_clean -m {{path/to/directory}}`
+
+- Only delete `._*` files if there's a matching native file:
+
+`dot_clean -n {{path/to/directory}}`
+
+- Follow symlinks:
+
+`dot_clean -s {{path/to/directory}}`
+
+- Print verbose output:
+
+`dot_clean -v {{path/to/directory}}`