WebStyle: goto regression test fixes

* Improves goto_engine related regression tests to take into account
  recent modification to the Atlantis Demo site, in particular
  with respect to restriction and file formats.
  (closes #1293)

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
31:1: F401 'nottest' imported but unused
34:1: E302 expected 2 blank lines, found 1
34: D209 Put multi-line docstring closing quotes on separate line
34: D400 First line should end with '.', not 'n'
34: D205 Blank line missing between one-line summary and description
41:1: E302 expected 2 blank lines, found 1
41: D203 Expected 1 blank line *before* class docstring, found 0
45: D400 First line should end with '.', not 'd'
58: D400 First line should end with '.', not 'e'
71: D203 Expected 1 blank line *before* class docstring, found 0
71: D204 Expected 1 blank line *after* class docstring, found 0
71: D400 First line should end with '.', not 'k'
73: D102 Docstring missing
81: D400 First line should end with '.', not 'y'
88: D400 First line should end with '.', not 'e'
93: D400 First line should end with '.', not 'e'
98: D400 First line should end with '.', not 'e'
103: D400 First line should end with '.', not 'e'
108: D400 First line should end with '.', not 'd'
113: D400 First line should end with '.', not 'd'
118: D400 First line should end with '.', not 'L'
125: D400 First line should end with '.', not 'n'
137:1: W391 blank line at end of file