syntaxes: put the 'linter' and 'formatter' commands on a separate line

To show that they are a different class of thing than the file-matching
regexes and the comment thing, which all kind of "describe" the file.

syntax/python.nanorc

@@ -3,9 +3,10 @@
 syntax python "\.py$"
 header "^#!.*python"
 magic "Python script"
-linter pyflakes
 comment "#"
 
+linter pyflakes
+
 # Function definitions.
 color brightblue "def [0-9A-Za-z_]+"
 # Keywords.