utils: Fix unescape() on non-ASCII strings.
'unicode_escape' assumes latin-1 as input.
Requirement to resolve SWH-SEARCH-12
Migrated from D6216 (view on Phabricator)
'unicode_escape' assumes latin-1 as input.
Requirement to resolve SWH-SEARCH-12
Migrated from D6216 (view on Phabricator)