diff --git a/src/gdiffer/output.py b/src/gdiffer/output.py
index aff8e0d..40ce07f 100644
--- a/src/gdiffer/output.py
+++ b/src/gdiffer/output.py
@@ -9,12 +9,14 @@ from gdiffer.models import DiffAnalysis
 
 
 class OutputFormat(Enum):
+    """Output format options."""
     TERMINAL = "terminal"
     JSON = "json"
     PLAIN = "plain"
 
 
 class SeverityColors:
+    """Color scheme for severity levels."""
     CRITICAL = "red"
     HIGH = "orange3"
     MEDIUM = "yellow"
@@ -23,6 +25,8 @@ class SeverityColors:
 
 
 class OutputFormatter:
+    """Formats and displays diff analysis results."""
+
     def __init__(self, output_format: OutputFormat = OutputFormat.TERMINAL):
         self.output_format = output_format
         self.console = Console(theme=Theme({
@@ -38,6 +42,7 @@ class OutputFormatter:
         }))
 
     def format_analysis(self, analysis: DiffAnalysis) -> str:
+        """Format the complete analysis for display."""
         if self.output_format == OutputFormat.JSON:
             return self._format_json(analysis)
         elif self.output_format == OutputFormat.PLAIN:
@@ -46,6 +51,7 @@ class OutputFormatter:
             return self._format_terminal(analysis)
 
     def _format_terminal(self, analysis: DiffAnalysis) -> str:
+        """Format for terminal display with colors."""
         output_parts = []
 
         output_parts.append(self._format_summary(analysis))
@@ -60,6 +66,7 @@ class OutputFormatter:
         return '\n'.join(output_parts)
 
     def _format_summary(self, analysis: DiffAnalysis) -> str:
+        """Format the summary section."""
         lines = []
         lines.append("[bold blue]=== Git Diff Analysis Summary ===[/bold blue]")
         lines.append(f"[info]Total files changed:[/info] [bold]{analysis.total_files}[/bold]")
@@ -76,6 +83,7 @@ class OutputFormatter:
         return '\n'.join(lines)
 
     def _format_files(self, analysis: DiffAnalysis) -> str:
+        """Format file changes section."""
         lines = []
         lines.append("\n[bold blue]=== File Changes ===[/bold blue]")
 
@@ -83,10 +91,10 @@ class OutputFormatter:
             lines.append(f"\n[filename]{i}. {file_obj.filename}[/filename]")
 
             change_emoji = {
-                "add": "[added][✚][/added]",
-                "delete": "[removed][✖][/removed]",
-                "rename": "[info][↪][/info]",
-                "modify": "[modified][✎][/modified]",
+                "add": "[added]✚[/added]",
+                "delete": "[removed]✖[/removed]",
+                "rename": "[info]↪[/info]",
+                "modify": "[modified]✎[/modified]",
             }
             change_label = change_emoji.get(file_obj.change_type, "")
             lines.append(f"   Status: {change_label} {file_obj.change_type}")
@@ -105,6 +113,7 @@ class OutputFormatter:
         return '\n'.join(lines)
 
     def _format_hunk(self, hunk) -> str:
+        """Format a single hunk with color-coded changes."""
         lines = []
         for line in hunk.new_lines_content:
             if line.startswith('+++'):
@@ -120,6 +129,7 @@ class OutputFormatter:
         return '\n'.join(lines)
 
     def _format_issues(self, issues: list[dict]) -> str:
+        """Format issues section."""
         lines = []
         lines.append("\n[bold blue]=== Detected Issues ===[/bold blue]")
 
@@ -129,8 +139,8 @@ class OutputFormatter:
         for issue in sorted_issues:
             severity = issue.get('severity', 'info').lower()
             color = getattr(SeverityColors, severity.upper(), 'info')
-            lines.append(f"\n[{color}][✖] {issue.get('title', 'Issue')}[/]")
-            lines.append(f"   Severity: [{color}]{severity.upper()}[/]")
+            lines.append(f"\n[{color}]✖ {issue.get('title', 'Issue')}[/[{color}]]")
+            lines.append(f"   Severity: [{color}]{severity.upper()}[/[{color}]]")
             lines.append(f"   Description: {issue.get('description', '')}")
             if issue.get('line'):
                 lines.append(f"   Line: {issue['line']}")
@@ -140,6 +150,7 @@ class OutputFormatter:
         return '\n'.join(lines)
 
     def _format_suggestions(self, suggestions: list[str]) -> str:
+        """Format suggestions section."""
         lines = []
         lines.append("\n[bold blue]=== Suggestions ===[/bold blue]")
 
@@ -149,6 +160,7 @@ class OutputFormatter:
         return '\n'.join(lines)
 
     def _format_json(self, analysis: DiffAnalysis) -> str:
+        """Format as JSON."""
         import json
 
         result = {
@@ -195,6 +207,7 @@ class OutputFormatter:
         return json.dumps(result, indent=2)
 
     def _format_plain(self, analysis: DiffAnalysis) -> str:
+        """Format as plain text without colors."""
         lines = []
         lines.append("=== Git Diff Analysis Summary ===")
         lines.append(f"Total files changed: {analysis.total_files}")
@@ -239,18 +252,22 @@ class OutputFormatter:
         return '\n'.join(lines)
 
     def print(self, content: str) -> None:
+        """Print content to console."""
         self.console.print(content)
 
     def print_analysis(self, analysis: DiffAnalysis) -> None:
+        """Print analysis result to console."""
         formatted = self.format_analysis(analysis)
         self.print(formatted)
 
 
 def format_analysis(analysis: DiffAnalysis, output_format: str = "terminal") -> str:
+    """Format analysis for display."""
     fmt = OutputFormatter(OutputFormat(output_format))
     return fmt.format_analysis(analysis)
 
 
 def print_analysis(analysis: DiffAnalysis, output_format: str = "terminal") -> None:
+    """Print analysis to console."""
     fmt = OutputFormatter(OutputFormat(output_format))
     fmt.print_analysis(analysis)