Update README.md

Fix #221 

Not sure what happened to the readme, this didn't used to be like this before. Anywho, this commit fixes it.

README.md

@@ -200,13 +200,13 @@ You can use the `Autosession {delete|search}` command to open a picker using `vi
 
 Command hooks exist in the format: {hook_name}
 
-- {pre*save}: executes \_before* a session is saved
-- {save*extra}: execute \_after* a session is saved, return string will save to `*x.vim`, reference `:help mks`
-- {post*save}: executes \_after* a session is saved
-- {pre*restore}: executs \_before* a session is restored
-- {post*restore}: executs \_after* a session is restored
-- {pre*delete}: executs \_before* a session is deleted
-- {post*delete}: executs \_after* a session is deleted
+- {pre_save}: executes _before_ a session is saved
+- {save_extra}: executes _after_ a session is saved, return string will save to `*x.vim`, reference `:help mks`
+- {post_save}: executes _after_ a session is saved
+- {pre_restore}: executes _before_ a session is restored
+- {post_restore}: executes _after_ a session is restored
+- {pre_delete}: executes _before_ a session is deleted
+- {post_delete}: executes _after_ a session is deleted
 
 Hooks are configured by setting