Changed . token to _dot

This change allows the dotfiles to work with chezmoi (e.g: on windows)
and improves grepability with neovim/telescope

dot_config/nushell/nu_scripts/modules/recursion/fact.nu

@@ -0,0 +1,9 @@
+# Compute the factorial of a number
+# This version just returns either the value or a thunk.
+# Meant to be used in a trampoline
+# But still uses APS
+def fact [n: int, acc=1] -> int {
+  if $n <= 1 { return $acc } else {
+    {|| fact ($n - 1) ($n * $acc) } # The thunk being returned to the trampoline
+  }
+}