diff --git a/README.md b/README.md
index d56e1a6..2a1d036 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ AI-assisted development tools to understand and execute these tasks.
 ## Features
 
 - Parse `CEDARScript` Abstract Syntax Tree (`AST`) that was generated by Tree-Sitter into a list of commands
-- Support for various code manipulation andn analysis commands (CREATE, UPDATE, RM, MV, SELECT)
+- Support for various code manipulation and analysis commands (CREATE, UPDATE, RM, MV, SELECT)
 - Return results in `XML` format for easier parsing and processing by LLM systems
 
 ## Installation
diff --git a/src/cedarscript_ast_parser/__init__.py b/src/cedarscript_ast_parser/__init__.py
index 58d14bc..017182b 100644
--- a/src/cedarscript_ast_parser/__init__.py
+++ b/src/cedarscript_ast_parser/__init__.py
@@ -1,17 +1,19 @@
-__version__ = "0.2.0"
+__version__ = "0.2.1"
 
 from .cedarscript_ast_parser import (
     CEDARScriptASTParser, ParseError, Command,
     CreateCommand, RmFileCommand, MvFileCommand, UpdateCommand,
-    SelectCommand, IdentifierFromFile, SingleFileClause, Segment, Marker, BodyOrWhole, MarkerType, RelativeMarker, RelativePositionType,
-    MoveClause, DeleteClause, InsertClause, ReplaceClause, EditingAction, Region, BodyOrWhole, WhereClause, RegionClause
+    SelectCommand, IdentifierFromFile, SingleFileClause, Segment, Marker, BodyOrWhole, MarkerType, RelativeMarker,
+    RelativePositionType, MoveClause, DeleteClause, InsertClause, ReplaceClause, EditingAction, Region, BodyOrWhole,
+    WhereClause, RegionClause
 )
 
 __all__ = (
     CEDARScriptASTParser, ParseError, Command,
     CreateCommand, RmFileCommand, MvFileCommand, UpdateCommand,
-    SelectCommand, IdentifierFromFile, SingleFileClause, Segment, Marker, BodyOrWhole, MarkerType, RelativeMarker, RelativePositionType,
-    MoveClause, DeleteClause, InsertClause, ReplaceClause, EditingAction, Region, BodyOrWhole, WhereClause, RegionClause
+    SelectCommand, IdentifierFromFile, SingleFileClause, Segment, Marker, BodyOrWhole, MarkerType, RelativeMarker,
+    RelativePositionType, MoveClause, DeleteClause, InsertClause, ReplaceClause, EditingAction, Region, BodyOrWhole,
+    WhereClause, RegionClause
 )
 
 
diff --git a/src/cedarscript_ast_parser/cedarscript_ast_parser.py b/src/cedarscript_ast_parser/cedarscript_ast_parser.py
index a78a3b5..36bcba2 100644
--- a/src/cedarscript_ast_parser/cedarscript_ast_parser.py
+++ b/src/cedarscript_ast_parser/cedarscript_ast_parser.py
@@ -6,6 +6,7 @@
 import cedarscript_grammar
 from dataclasses import dataclass
 
+
 class ParseError(NamedTuple):
     command_ordinal: int
     message: str
@@ -14,10 +15,13 @@ class ParseError(NamedTuple):
     suggestion: str
 
     def __str__(self):
+        line_msg = f'; LINE #{self.line}' if self.line else ''
+        col_msg = f'; COLUMN #{self.column}' if self.column else ''
+        suggestion_msg = f'{self.suggestion} ' if self.suggestion else ''
         return (
-            f"<error-details><error-location>COMMAND #{self.command_ordinal}{f'; LINE #{self.line}' if self.line else ''}{f'; COLUMN #{self.column}' if self.column else ''}</error-location>"
+            f"<error-details><error-location>COMMAND #{self.command_ordinal}{line_msg}{col_msg}</error-location>"
             f"<type>PARSING (no commands were applied at all)</type><description>{self.message}</description>"
-            f"<suggestion>{f"{self.suggestion} " if self.suggestion else ""}"
+            f"<suggestion>{suggestion_msg}"
             "(NEVER apologize; just take a deep breath, re-read grammar rules (enclosed by <grammar.js> tags) "
             "and fix you CEDARScript syntax)</suggestion></error-details>"
         )
@@ -39,6 +43,7 @@ class MarkerCompatible:
     def as_marker(self) -> 'Marker':
         pass
 
+
 @dataclass
 class Marker(MarkerCompatible):
     type: MarkerType
@@ -69,7 +74,7 @@ def __str__(self):
             case RelativePositionType.AT:
                 pass
             case _:
-                result = f'{result} ({self.qualifier.replace('_', ' ')})'
+                result = f'{result} ({str(self.qualifier).replace('_', ' ')})'
         return result
 
 
@@ -112,7 +117,7 @@ def as_marker(self) -> Marker:
         return Marker(self.identifier_type, self.where_clause.value, self.offset)
 
     def __str__(self):
-        result = f"{self.identifier_type.lower()} ({self.where_clause})"
+        result = f"{str(self.identifier_type).lower()} ({self.where_clause})"
         if self.offset is not None:
             result += f" at offset {self.offset}"
         return f"{result} from file {self.file_path}"
@@ -188,6 +193,7 @@ def files_to_change(self) -> tuple[str, ...]:
 class CreateCommand(FileCommand):
     content: str
 
+
 @dataclass
 class RmFileCommand(FileCommand):
     pass
@@ -423,8 +429,10 @@ def parse_where_clause(self, node):
         return WhereClause(field=field, operator=operator, value=value)
 
     def parse_update_action(self, node):
-        child_types = ['update_delete_region_clause', 'update_delete_mos_clause', 'update_move_region_clause', 'update_move_mos_clause',
-                                                     'insert_clause', 'replace_mos_clause', 'replace_region_clause']
+        child_types = [
+            'update_delete_region_clause', 'update_delete_mos_clause', 'update_move_region_clause',
+            'update_move_mos_clause', 'insert_clause', 'replace_mos_clause', 'replace_region_clause'
+        ]
         action_node = self.find_first_by_type(node.named_children, child_types)
         if action_node is None:
             raise ValueError("No valid action found in update command")
@@ -525,7 +533,7 @@ def parse_offset_clause(self, node):
             return None
         return int(self.find_first_by_type(node.children, 'number').text)
 
-    def parse_relative_indentation(self, node) -> int:
+    def parse_relative_indentation(self, node) -> int | None:
         node = self.find_first_by_type(node.named_children, 'relative_indentation')
         if node is None:
             return None
@@ -537,13 +545,12 @@ def parse_content(self, node) -> str | tuple[Region, int | None]:
             return None
         match content.type:
             case 'content_clause':
-                return self.parse_content_clause(content) # str
+                return self.parse_content_clause(content)  # str
             case 'content_from_segment':
-                return self.parse_content_from_segment_clause(content) # tuple[Region, int]
+                return self.parse_content_from_segment_clause(content)  # tuple[Region, int]
             case _:
                 raise ValueError(f"Invalid content type: {content.type}")
 
-
     def parse_singlefile_clause(self, node):
         if node is None or node.type != 'singlefile_clause':
             raise ValueError("Expected singlefile_clause node")
@@ -581,7 +588,8 @@ def parse_to_value_clause(self, node):
             raise ValueError("No value found in to_value_clause")
         return self.parse_string(value_node)
 
-    def parse_string(self, node):
+    @staticmethod
+    def parse_string(node):
         match node.type.casefold():
             case 'string':
                 node = node.named_children[0]
@@ -596,7 +604,8 @@ def parse_string(self, node):
 
         return text
 
-    def parse_multiline_string(self, node):
+    @staticmethod
+    def parse_multiline_string(node):
         return node.text.decode('utf8').strip("'''").strip('"""')
 
     def parse_relative_indent_block(self, node) -> str:
@@ -610,7 +619,8 @@ def parse_relative_indent_block(self, node) -> str:
                     lines.append(f"{' ' * (4 * indent)}{content.text}")
         return '\n'.join(lines)
 
-    def find_first_by_type(self, nodes: Sequence[any], child_type):
+    @staticmethod
+    def find_first_by_type(nodes: Sequence[any], child_type):
         if isinstance(child_type, list):
             for child in nodes:
                 if child.type in child_type:
@@ -621,7 +631,8 @@ def find_first_by_type(self, nodes: Sequence[any], child_type):
                     return child
         return None
 
-    def find_first_by_field_name(self, node: any, field_names):
+    @staticmethod
+    def find_first_by_field_name(node: any, field_names):
         if not isinstance(field_names, list):
             return node.child_by_field_name(field_names)
 

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