Implemented some enhancement requests

tests/core/test_sheerka_printer.py

@@ -3,7 +3,6 @@ from dataclasses import dataclass
 import pytest
 from core.builtin_concepts import BuiltinConcepts
 from core.concept import Concept, ConceptParts
-from core.sheerka.services.SheerkaFilter import Pipe, SheerkaFilter
 from printer.Formatter import Formatter, BraceToken
 from printer.SheerkaPrinter import FormatInstructions
 
@@ -446,16 +445,6 @@ bar: *name 'bar' is not defined*
         captured = capsys.readouterr()
         assert captured.out == expected
 
-    def test_i_can_manage_exception_when_printing(self, capsys):
-        sheerka = self.get_sheerka()
-        filter_service = SheerkaFilter(sheerka)
-        predicate = "self='two'"  # it should be self=='two'
-        items = ["one", "two", "three"] | Pipe(filter_service.pipe_filter)(predicate)
-
-        sheerka.print(items)
-        captured = capsys.readouterr()
-        assert captured.out == "\x1b[31mSyntaxError: invalid syntax\nself='two'\n    ^\x1b[0m\n"
-
     @pytest.mark.parametrize("template, expected", [
         (None, []),
         ("", []),