shell-file-name-quote-list

shell-file-name-quote-list is a variable defined in `shell.el'.
Its value is

(124 38 60 62 40 41 59 32 36 42 33 34 39 96 35 92)

Documentation:
List of characters to quote when in a file name.
This variable is used to initialize `comint-file-name-quote-list' in the
shell buffer. The value may depend on the operating system or shell.

You can customize this variable.