Fix T75018: Dirty vertex colours missing tooltip

release/scripts/startup/bl_operators/vertexpaint_dirt.py

@@ -145,6 +145,7 @@ from math import pi
 
 
 class VertexPaintDirt(Operator):
+    '''Generate a dirt map gradient based on cavity'''
     bl_idname = "paint.vertex_color_dirt"
     bl_label = "Dirty Vertex Colors"
     bl_options = {'REGISTER', 'UNDO'}