Tried using this as usersettings in ST3 Build 3114, running on Windows 7, to pick up all whitespace characters (including space, tab, line feed, form feed etc.) + control characters:
"trailing_spaces_regexp": "[\c[A-Z]\s]+"
Also tried being satisfied with just all whitespace characters:
"trailing_spaces_regexp": "[\s]+"
However, neither of these work and ST3 reports the error given in the subject.
Tried using this as usersettings in ST3 Build 3114, running on Windows 7, to pick up all whitespace characters (including space, tab, line feed, form feed etc.) + control characters:
"trailing_spaces_regexp": "[\c[A-Z]\s]+"
Also tried being satisfied with just all whitespace characters:
"trailing_spaces_regexp": "[\s]+"
However, neither of these work and ST3 reports the error given in the subject.
These are valid JS RegExp character classes and ought to work.