Simplied table divider code for ease of reading

Author: kmvanbrunt

cmd2/table_creator.py

@@ -548,11 +548,13 @@ def generate_header(self) -> str:
             total_width = self.total_width()
             divider_char_width = ansi.style_aware_wcswidth(self.divider_char)
 
-            # Add padding if divider char does not divide evenly into table width
-            divider = (self.divider_char * (total_width // divider_char_width)) + (SPACE * (total_width % divider_char_width))
+            # Make divider as wide as table and use padding if width of
+            # divider_char does not divide evenly into table width.
+            divider = self.divider_char * (total_width // divider_char_width)
+            divider += SPACE * (total_width % divider_char_width)
+
             header_buf.write('\n')
             header_buf.write(divider)
-
         return header_buf.getvalue()
 
     def generate_data_row(self, row_data: Sequence[Any]) -> str: