minor formatting change
refrain from handling conflicting window indexes

Reducing complexity in code is the primary reason. Conflicting indexes
will simply be overwritten.
extracting method to remove conditional
splitting conditional into methods
extracting methods in tests to a common file
fix: invoking automux without arguments
renaming a feature file
renaming create_pane -> split_window
adding a note for blueprint name with opts
adding nodoc where required
2.3.0 release