Fix issue with bias component in _v() (pattern.text)
This fixes a bug introduced in which causes the majority of unit tests in pattern.en (test_en.py) to fail.
Resolves
@@ -445,7 +445,7 @@ class Model(object):
p = ("", "") if not p else (p[0] or "", p[1] or "")
n = ("", "") if not n else (n[0] or "", n[1] or "")
v = {}
- f(v, "b", " ") # Bias.
+ f(v, "b", "b") # Bias.
f(v, "h", token[:1]) # Capitalization.
f(v, "w", token[-6:] if token not in self.known or token in self.unknown else "")
f(v, "x", token[-3:]) # Word suffix.
