Easier renaming of camelCase and snake_case words

Accomplished with the one and only tpope's abolish plugin.

Author: TheDDMbassy

lua/plugins/abolish-subvert.lua

@@ -0,0 +1,32 @@
+return {
+  'tpope/vim-abolish',
+
+  --[[
+  -- In Elixir, I wanted to change "activity" to "reading_room", but
+  -- "Activity" to "ReadingRoom".
+  --
+  -- In the before times, I would have to :%s/activity/reading_room/g
+  -- and then run :%s/Activity/ReadingRoom/g to get all the changes to take.
+  --
+  -- In the new world, simply run one command:
+  -- :%Subvert/activity/reading_room/g
+  --
+  -- (or, in the plural case, :%S/activit{y,ies}/reading_room{,s}/g)
+  --
+  -- and that's it! That command will turn this:
+  --
+  # BEFORE
+  defmodule ReadsomethingWeb.ActivityHTML do
+    use ReadsomethingWeb, :html
+
+    embed_templates "activity_html/*"
+  end
+  
+  # AFTER
+  defmodule ReadsomethingWeb.ReadingRoomHTML do
+    use ReadsomethingWeb, :html
+
+    embed_templates "reading_room_html/*"
+  end
+  --]]
+}