Now regex templates with parameter comment = '' do not add calculate comment. fixed #70

calculate/templates/format/base_format.py

@@ -370,6 +370,7 @@ class Format():
         return header, document_text
 
     def _make_header(self, template_paths: list):
+        print('making header...')
         if not self.comment_symbol:
             return ""
         elif self.comment_symbol in ("xml", "XML"):

calculate/templates/format/regex_format.py

@@ -29,6 +29,9 @@ class RegexFormat(Format):
 
         self._multiline_flag = parameters.multiline
         self._dotall_flag = parameters.dotall
+        if parameters.comment is not False:
+            self.comment_symbol = parameters.comment
+        print(f'comment symbol is set to: "{self.comment_symbol}"')
         self._parsed_patch = None
 
         if add_header and not ignore_comments:

tests/templates/format/test_regex.py

@@ -320,6 +320,64 @@ WorldWWWW
 
 
 Testing
+'''
+
+        original_object = RegexFormat(original_text, '/path/to/template',
+                                      add_header=True, already_changed=True,
+                                      parameters=parameters)
+        template_object = RegexFormat(template_text, '/path/to/template',
+                                      parameters=parameters)
+        original_object.join_template(template_object)
+        assert original_object.document_text == join_result
+
+    def test_format_with_empty_comment_parameter(self):
+        parameters = ParametersContainer({'multiline': True,
+                                          'dotall': True,
+                                          'comment': ''})
+        original_text = '''
+Hello
+'''
+
+        template_text = r'''
+<reg>Hello</reg>
+<text></text>
+'''
+
+        join_result = '''
+
+'''
+
+        original_object = RegexFormat(original_text, '/path/to/template',
+                                      add_header=True, already_changed=True,
+                                      parameters=parameters)
+        template_object = RegexFormat(template_text, '/path/to/template',
+                                      parameters=parameters)
+        original_object.join_template(template_object)
+        assert original_object.document_text == join_result
+
+    def test_format_with_empty_comment_parameter_and_with_header_in_original_document(self):
+        parameters = ParametersContainer({'multiline': True,
+                                          'dotall': True,
+                                          'comment': ''})
+        original_text = '''#-------------------------------------------------------------------------------
+# Modified by Calculate Utilities 4.0
+# Processed template files:
+# /path/to/ancient/template
+#-------------------------------------------------------------------------------
+Hello
+'''
+
+        template_text = r'''
+<reg>Hello</reg>
+<text></text>
+'''
+
+        join_result = '''#-------------------------------------------------------------------------------
+# Modified by Calculate Utilities 4.0
+# Processed template files:
+# /path/to/ancient/template
+#-------------------------------------------------------------------------------
+
 '''
 
         original_object = RegexFormat(original_text, '/path/to/template',