[ERRORNAME]
The name of an error, usually returned in the errno variable.
Key
The name of a keyboard key. Return and Enter both refer to the same key.
Term
The defined use of an important word or phrase.
UserInput
Commands and other text that you type.
Variable
The name of a placeholder in a command, function, or other syntax display that you replace
with an actual value.
[ ]
The contents are optional in formats and command descriptions. If the contents are a list
separated by |, you must choose one of the items.
{ }
The contents are required in formats and command descriptions. If the contents are a list
separated by |, you must choose one of the items.
...
The preceding element can be repeated an arbitrary number of times.
|
Separates items in a list of choices.
Typographic Conventions 9
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