Feature #1818

Strongest examples

On text the dictionary never trained on. The underlined token is where it fires most.

1. python 6.97
   and b. For example, `mean(1, 12)` returns `6.
2. python 6.93
   ` returns the cube of x. For example, `cubed(1)` returns `1`.
3. python 6.86
   returns True if x is positive. For example, `positive(-1)` returns `False`.
4. python 6.85
   . For example, `max_of(7, 12)` returns `12
5. python 6.8
   . For example, `lower_of(3, 11)` returns `3`.
6. python 6.76
   returns the opposite of x. For example, `opposite(11)` returns `-1
7. python 6.71
   ` returns the factorial of n. For example, `fact(1)` returns `1`.
8. python 6.66
   the length of s. For example, `num_chars("moon")` returns `4`.
9. python 6.65
   double` returns twice x. For example, `double(12)` returns `24
10. python 6.58
    . For example, `lower_of(6, 10)` returns `6`.
11. python 6.56
    True if x is odd. For example, `odd(11)` returns `True`.
12. python 6.45
    absolute value of x. For example, `abs_value(-1)` returns `1`.