Fix bad reference to an example in section 6.1 "Labels"#142

Merged

dblodgett-usgs merged 1 commit intocf-convention:masterfrom ethanrd:Fix-ch06_Label-example

Jul 17, 2019

+7-6

Commits on Jul 24, 2018

Fix for bad reference to an example in section 6.1 "Labels". Also update numbering of examples in chapter 6.
ethanrd
committed