osx/*: update page (#7665)

pages/common/rubocop.md

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+# rubocop
+
+> Lint Ruby files.
+> More information: <https://docs.rubocop.org/rubocop/usage/basic_usage.html>.
+
+- Check all files in the current directory (including subdirectories):
+
+`rubocop`
+
+- Check one or more specific files or directories:
+
+`rubocop {{path/to/file}} {{path/to/directory}}`
+
+- Write output to file:
+
+`rubocop --out {{path/to/file}}`
+
+- View list of cops (linter rules):
+
+`rubocop --show-cops`
+
+- Exclude a cop:
+
+`rubocop --except {{cop_1}} {{cop_2}}`
+
+- Run only specified cops:
+
+`rubocop --only {{cop_1}} {{cop_2}}`
+
+- Auto-correct files (experimental):
+
+`rubocop --auto-correct`