Neighbor should be none instead of end of file token And additional check for none

resolves #26
A check for none was missingAce but more importantly most of the functions expected none values When at the end of file But received EOF token instead

Author: mpourmpoulis

library/repair.py

@@ -18,6 +18,7 @@ def get_dummy(atok):
 
 def neighbors(atok,t):
 	x = next_token(atok,t)
+	x = x if x and x.type != 0 else None
 	y =  next_token(atok,x) if x else None
 	z = previous_token(atok,t)
 	w =  previous_token(atok,z) if z else None
@@ -123,7 +124,7 @@ def after_both_sides(t):
 	return t[1] is None or not(
 		start_atom(t[1]) or 
 		t[1].string in STARTING_UNARY or 
-		(t[1].string,t[2].string) in STARTING_UNARY
+		(t[2] is not None and (t[1].string,t[2].string) in STARTING_UNARY)
 	)
 
 def before_both_sides(t):

library/selection_node.py

@@ -17,14 +17,11 @@ def nearest_node_from_offset(root,atok,offset,special=False):
         following = next_token(atok,original_token)
         while following  and following.string.isspace():
             token = following
-            following = next_token(atok,original_token)
+            following = next_token(atok,token)
         if following:
             token = following
-    raise Exception("boom")
     s = token.startpos
     r = node_from_range(root,atok,(s,s),special= special,lenient = True)
-    print("r",r,ast.dump(r))
-    raise Exception("boom")
     return r
 
 def node_from_range_old(root,atok, r ):