# Functions
HexEscape returns s, with all runes for which shouldEscape returns true escaped to "__0xXXX__", where XXX is the hex representation of the rune value.
HexUnescape reverses HexEscape.
IsASCIIAlphanumeric returns true iff r is alphanumeric: a-z, A-Z, 0-9.
URLEscape uses url.PathEscape to escape s.
URLUnescape reverses URLEscape using url.PathUnescape.
# Constants
NonUTF8String is a string for which utf8.ValidString returns false.
# Variables
WeirdStrings are unusual/weird strings for use in testing escaping.