Update cheatsheets

2to3

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# 2to3
+
+> Automated Python 2 to 3 code conversion.
+> More information: <https://docs.python.org/3/library/2to3.html>.
+
+- Display the changes that would be performed without performing them (dry-run):
+
+`2to3 {{path/to/file.py}}`
+
+- Convert a Python 2 file to Python 3:
+
+`2to3 --write {{path/to/file.py}}`
+
+- Convert specific Python 2 language features to Python 3:
+
+`2to3 --write {{path/to/file.py}} --fix={{raw_input}} --fix={{print}}`
+
+- Convert all Python 2 language features except the specified ones to Python 3:
+
+`2to3 --write {{path/to/file.py}} --nofix={{has_key}} --nofix={{isinstance}}`
+
+- List all available language features that can be converted from Python 2 to Python 3:
+
+`2to3 --list-fixes`
+
+- Convert all Python 2 files in a directory to Python 3:
+
+`2to3 --output-dir={{path/to/python3_directory}} --write-unchanged-files --nobackups {{path/to/python2_directory}}`
+
+- Run 2to3 with multiple threads:
+
+`2to3 --processes={{4}} --output-dir={{path/to/python3_directory}} --write --nobackups --no-diff {{path/to/python2_directory}}`