win 7 x64
Broken: 2.79 RC2 and 6859695
Short description of error
Its changing the .L/R but its not removing the .001 (.xxx) number of the bone that its generated after copying it.
2.79 RC2 And above
Exact steps for others to reproduce the error
1-Select, if it is not selected, the bone asda.L.001
2- in edit mode Press "W" and select flip names