diff --git a/cleanup.py b/cleanup.py
index 2107945..1b769c3 100644
--- a/cleanup.py
+++ b/cleanup.py
@@ -12,18 +12,25 @@ def fix_dashes(lines):
 
     fixed_lines = []
 
+    # Distinguish between the prologue and the content.
     within_content = False
 
+    # Iterate over the awesome lines.
     for line in lines:
 
-        # Only touch the content, not the prologue.
+        # The current line is within the content.
         if within_content:
+
+            # Adjust the dash.
             fixed_lines.append(line.replace(u' - ', u' — '))
         #
+        # The current line is within the prologue.
         else:
+            # The prologue has ended.
             if line.startswith(u'## Applications'):
                 within_content = True
 
+            # Leave the current line unmodified.
             fixed_lines.append(line)
 
     return fixed_lines
@@ -35,6 +42,7 @@ def fix_dashes(lines):
 with codecs.open('README.md', encoding='utf8') as awesome_file:
     awesome_lines = awesome_file.readlines()
 
+# Fix the dashes.
 awesome_lines = fix_dashes(awesome_lines)
 
 # Write the awesome file.