increase allowed line-length, fix whitespace in cli.py

setup.cfg

@@ -8,4 +8,4 @@ universal=1
 
 [flake8]
 exclude = .git,.tox,.github,.eggs,__pycache__,doc/conf.py,build,dist,capabilities-data,test
-max-line-length = 100
+max-line-length = 120

src/escpos/cli.py

@@ -244,13 +244,13 @@ ESCPOS_COMMANDS = [
                 'option_strings': ('--high_density_horizontal',),
                 'help': 'Image density (horizontal)',
                 'type': str_to_bool,
-            },     
+            },
             {
                 'option_strings': ('--high_density_vertical',),
                 'help': 'Image density (vertical)',
                 'type': str_to_bool,
-            },      
-                      
+            },
+
         ],
     },
     {