Which of the following characters can be combined with a separator string in order to read from the current input source until the separator string, which is on a separate line and without any trailing spaces, is reached?
he double less-than symbol << is used for here documents in many shell scripting languages. It allows reading input from the current source until a specified delimiter is encountered.
For example, consider the following command:
command <<END
This is the input
until the END delimiter is reached.
END
In this case, the command would read everything between the <<END and END as input until it encounters the delimiter END on a separate line without any trailing spaces. The input is then processed by the command.
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