Steps to reproduce:

1. Open attached project "FontCenter.zip"
2. Open scene "Untitled"
3. In hierarchy, select "New Text"
4. Change Anchor point to "Middle left" and inspect Pivot position. Notice that there's some space between the pivot point and mesh.

Additional steps:
5. Change anchor position to "Middle right"
6. Notice that Pivot overlaps with mesh

Note: Issue shown in Additional steps 5-6 was introduced in 5.4.0b5, 5.4.0b4 and prior versions don't have this issue and pivot is right on the edge of the TextMesh, as expected.

Reproduced with: 4.6.8p1, 5.1.4f1, 5.2.4f1, 5.3.4f1, 5.4.0b10