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/gcd.nu

@@ -0,0 +1,15 @@
+# Euclid's algorithm for determining greatest common divisor between 2 positive integers
+# Based on this clear explanation from Rutgers: https://sites.math.rutgers.edu/~greenfie/gs2004/euclid.html
+
+# Returns the GCD of its 2 arguments
+def gcd [i1: int, i2: int] -> int {
+  mut a = $i1; mut b = $i2
+  if $a < $b { let tmp = $a; $a = $b; $b = $tmp }
+  let q = $a // $b; let r = $a mod $b
+  if $r == 0 { 
+   $b
+  } else {
+  gcd $b $r
+  }
+}
+