String concatenation operators

# String concatenation operators String concatenation operators
These operators concatenate strings. The syntax is: <target> .= <right_operand> <target> << <right_operand> <target> <, <right_operand> Operator .= appends <right_operand> to <target>. Operator << appends a space followed by <right_operand> to <target> if <target> is non empty, otherwise sets <target> to <right_operand>. Operator <, is similar to << but uses a comma to separate the two variable contents. The last two operators are useful in creating space-separated or comma-separated lists.
Examples
        %a = ""
        %a << free
        echo %a
        %a .= bsd
        echo %a
        %a << rox
        echo %a
        %a <, but linux is better!
        echo %a
See also
operators

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