[config] adds a __doc__ constructor kwarg to set option documentation inline.

bonobo/config/options.py

@@ -53,13 +53,15 @@ class Option:
 
     _creation_counter = 0
 
-    def __init__(self, type=None, *, required=True, positional=False, default=None):
+    def __init__(self, type=None, *, required=True, positional=False, default=None, __doc__=None):
         self.name = None
         self.type = type
         self.required = required if default is None else False
         self.positional = positional
         self.default = default
 
+        self.__doc__ = __doc__ or self.__doc__
+
         # This hack is necessary for python3.5
         self._creation_counter = Option._creation_counter
         Option._creation_counter += 1

bonobo/nodes/basics.py

@@ -77,9 +77,13 @@ def _shorten(s, w):
 
 
 class PrettyPrinter(Configurable):
-    max_width = Option(int, required=False, __doc__='''
+    max_width = Option(
+        int,
+        required=False,
+        __doc__='''
         If set, truncates the output values longer than this to this width.
-    ''')
+    '''
+    )
 
     def call(self, *args, **kwargs):
         formater = self._format_quiet if settings.QUIET.get() else self._format_console