Project based Pry history

pryrc.rb

# append to ~/.pryrc
local_pry_history = File.join(Dir.pwd, '.pry_history')
if File.file? local_pry_history
  puts("\e[33mUsing local Pry history:\e[0m #{local_pry_history}")
  Pry.config.history.file = local_pry_history
end

# ## Add a `.pry_history` to project directory:
#
#     cd path/to/project
#     touch .pry_history
#
# ## Append to `.gitignore`:
#
#    .pry_history
#