We used the following typographical conventions in this book:
- Italic
Indicates new terms, commands and command-line options, URLs, email addresses, filenames, and file extensions.
Constant width
Used for program listings, as well as within paragraphs to refer to program elements such as variable or function names, data types, and environment variables.
Constant width bold
Shows user input at the command line.
Constant width italic
Shows placeholder user input that you should replace with something that makes sense for you.
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