Shadow Evade concealment scaling incorrect

[daninil]

Description of Bug Experienced:
Shadow Evade is supposed to scale to 40% concealment at level 13 SD; however it stays at 30%.

Steps to reproduce the Bug:
Level 13 Shadow Dancer, cast Shadow Evade.

Expected Result:
Concealment should be scaled to 40% for level 13 SD, according to: http://wiki.nwnarelith.com/Shadowdancer

Actual Result:
Instead, concealment stays at 30%, not properly scaling to 40% at this level.

[Kalopsia]

The code is working as intended; the wiki is wrong there.
The actual progression is:
SD 10 to 11: 20%
SD 12 to 13: 30%
SD 14 to 15: 40%
SD 16+: 50%