./link_workflow.sh -h does not return usage

[RussTreadon-NOAA]

Expected behavior
./link_workflow.sh -h should return the usage section in the script.

Current behavior

Orion-login-3[82] rtreadon$ ./link_workflow.sh -h
+ RUN_ENVIR=EMC
+ OPTIND=1
+ getopts :ho option
+ case "${option}" in
+ usage
./link_workflow.sh: line 26: usage: command not found
Orion-login-3[83] rtreadon$

Machines affected
Only tested on Orion

To Reproduce

1. clone g-w develop at 833b8f4
2. cd sorc
3. ./link_workflow.sh -h