tools/spec: update whitespacing to conform to PEP8

tools/spec.py

@@ -141,7 +141,6 @@ class unscoped(type):
     def declare(self):
         return "\n".join(t.declare() for t in self.values)
 
-
     def define(self,reg):
         return "\n".join(t.define(reg.types) for t in self.values)
 
@@ -197,7 +196,7 @@ class bitmask(type):
         }
 
     def define(self, reg: registry):
-        return self.declare();
+        return self.declare()
 
         if not self.requires:
             return self.declare()