Radomír Bosák 1fbcb1ee9d Add the possibility to rename abbreviations
The abbr function doesn't have the possiblity to rename abbreviations.
You have to delete the old one and create a new one. This commit adds
this functionality and uses the syntax:

abbr -r OLD_KEY NEW_KEY

Fixes #2155.
2016-12-01 14:42:20 -08:00
..
2016-11-10 16:23:08 -08:00