Neovim continues to show "Searching ..." in the command line even after search completes

[tariqnoman]

Neovim continues to show "Searching ..." even after search completes giving an impression that the search is still ongoing or frozen/hang.

The issue behind this is the redraw! in ack#ShowResults() Do not use redraw! in ack.vim as it doesn't clear the command line on neovim

Refer https://github.com/neovim/neovim/issues/9524 which recommends not to use :redraw! to clear the command line. Instead use :echo without argument.