Skylib module containing shell utility functions.
## shell.array_literal
shell.array_literal(iterable)
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.
**PARAMETERS**
| Name | Description | Default Value |
| :------------- | :------------- | :------------- |
| iterable | A sequence of elements. Elements that are not strings will be converted to strings first, by calling `str()`. | none |
**RETURNS**
A string that represents the sequence as a shell array; that is,
parentheses containing the quoted elements.
## shell.quote
shell.quote(s)
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.)
**PARAMETERS**
| Name | Description | Default Value |
| :------------- | :------------- | :------------- |
| s | The string to quote. | none |
**RETURNS**
A quoted version of the string that can be passed to a shell command.