Creates a string from a sequence that can be used as a shell array.
For example, shell.array_literal(["a", "b", "c"]) would return the string ("a" "b" "c"), which can be used in a shell script wherever an array literal is needed.
Note that all elements in the array are quoted (using shell.quote) for safety, even if they do not need to be.
Quotes the given string for use in a shell command.
This function quotes the given string (in case it contains spaces or other shell metacharacters.)