Fix whitespace preservation in replacement strings (Issue #8)

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 name = "comfyui_stringessentials"
 description = "Simple string manipulation nodes for ComfyUI (strip/remove text strings, search and replace text strings, preview modified string outputs). Useful for modifying text prompts or results from LLM outputs. Nodes will be located under standard Add Node > utils menu. Node names: String Textbox, String Strip, String Multi Replace, String Conditional Append and String Preview."
-version = "2.0.3"
+version = "2.0.4"
 license = {file = "LICENSE"}
 
 [project.urls]

string_multi_replace_node.py

@@ -35,13 +35,13 @@ class StringMultiReplaceNode:
         # Create a list of all replacements
         replacements = []
         for line in replacement_pairs.splitlines():
-            line = line.strip()
-            if not line or replacement_delimiter not in line:
+            # Don't strip the line yet to preserve trailing whitespace in replacements (Issue #8)
+            if not line or line.isspace() or replacement_delimiter not in line:
                 continue
 
             search_str, replace_str = line.split(replacement_delimiter, 1)
             search_str = search_str.strip()
-            replace_str = replace_str.strip()
+            # Don't strip replace_str to allow intentional spaces/whitespace (Issue #8)
 
             if not search_str:
                 continue

test_string_nodes.py

@@ -344,5 +344,65 @@ goodbye"""
         self.assertEqual(result, "Hello world goodbye")
         self.assertFalse(was_appended)
 
+    def test_replace_with_space(self):
+        # Test Issue #8: Replace with space (trailing space should be preserved)
+        input_string = "hello_world_test"
+        replacement_pairs = "_:: "
+        result = self.replace_node.string_replace(
+            input_string=input_string,
+            replacement_pairs=replacement_pairs,
+            replacement_delimiter="::",
+            match_case=False,
+            match_whole_string=False,
+            preserve_punctuation=True,
+            remove_extra_spaces=False
+        )[0]
+        self.assertEqual(result, "hello world test")
+
+    def test_replace_with_leading_space(self):
+        # Test Issue #8: Replace with leading space
+        input_string = "value1,value2,value3"
+        replacement_pairs = ",::, "
+        result = self.replace_node.string_replace(
+            input_string=input_string,
+            replacement_pairs=replacement_pairs,
+            replacement_delimiter="::",
+            match_case=False,
+            match_whole_string=False,
+            preserve_punctuation=True,
+            remove_extra_spaces=False
+        )[0]
+        self.assertEqual(result, "value1, value2, value3")
+
+    def test_replace_with_whitespace_only(self):
+        # Test Issue #8: Replace with only whitespace
+        input_string = "word1___word2"
+        replacement_pairs = "___::   "
+        result = self.replace_node.string_replace(
+            input_string=input_string,
+            replacement_pairs=replacement_pairs,
+            replacement_delimiter="::",
+            match_case=False,
+            match_whole_string=False,
+            preserve_punctuation=True,
+            remove_extra_spaces=False
+        )[0]
+        self.assertEqual(result, "word1   word2")
+
+    def test_replace_with_tab(self):
+        # Test Issue #8: Replace with tab character
+        input_string = "column1|column2|column3"
+        replacement_pairs = "|::\t"
+        result = self.replace_node.string_replace(
+            input_string=input_string,
+            replacement_pairs=replacement_pairs,
+            replacement_delimiter="::",
+            match_case=False,
+            match_whole_string=False,
+            preserve_punctuation=True,
+            remove_extra_spaces=False
+        )[0]
+        self.assertEqual(result, "column1\tcolumn2\tcolumn3")
+
 if __name__ == '__main__':
     unittest.main()