old_contents: #!/usr/bin/python
  #    Copyright 2017 Joshua Charles Campbell
  #
  #    This file is part of UnnaturalCode.
  #    
  #    UnnaturalCode is free software: you can redistribute it and/or modify
  #    it under the terms of the GNU Affero General Public License as published by
  #    the Free Software Foundation, either version 3 of the License, or
  #    (at your option) any later version.
  #
  #    UnnaturalCode is distributed in the hope that it will be useful,
  #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #    GNU Affero General Public License for more details.
  #
  #    You should have received a copy of the GNU Affero General Public License
  #    along with UnnaturalCode.  If not, see <http://www.gnu.org/licenses/>.
  
  from six import integer_types
  
  class CompileError(object):
      def __init__(self, 
                   filename=None, 
                   line=None, 
                   column=None, 
                   functionname=None,
                   text=None,
                   errorname=None):
          assert line is not None
          assert isintance(line, integer_types)
          self.filename = filename
          self.line = line
          self.functionname = functionname
          self.text = text
          self.errorname = errorname
          if column is not None:
              assert isintance(column, integer_types)
          self.column = column
  
  """
  Compile result should be a list of CompileError objects,
  or if compile was successful, None (no list at all).
  """
  
new_contents: #!/usr/bin/python
  #    Copyright 2017 Joshua Charles Campbell
  #
  #    This file is part of UnnaturalCode.
  #    
  #    UnnaturalCode is free software: you can redistribute it and/or modify
  #    it under the terms of the GNU Affero General Public License as published by
  #    the Free Software Foundation, either version 3 of the License, or
  #    (at your option) any later version.
  #
  #    UnnaturalCode is distributed in the hope that it will be useful,
  #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #    GNU Affero General Public License for more details.
  #
  #    You should have received a copy of the GNU Affero General Public License
  #    along with UnnaturalCode.  If not, see <http://www.gnu.org/licenses/>.
  
  from six import integer_types
  
  class CompileError(object):
      def __init__(self, 
                   filename=None, 
                   line=None, 
                   column=None, 
                   functionname=None,
                   text=None,
                   errorname=None):
          assert line is not None
          assert isinstance(line, integer_types)
          self.filename = filename
          self.line = line
          self.functionname = functionname
          self.text = text
          self.errorname = errorname
          if column is not None:
              assert isintance(column, integer_types)
          self.column = column
  
  """
  Compile result should be a list of CompileError objects,
  or if compile was successful, None (no list at all).
  """
  
subject: Update compiler_error; fixed typo line 30