Lots of stuff. Working on refactoring

fish/functions/try_subst.fish

@@ -0,0 +1,14 @@
+function try_subst
+  # Use s/word/replacement<tab> to replace word with replacement 
+  # in last command
+  commandline | read -l saved_commandline
+
+  set -l pattern '^s/..*/.*$'
+
+  if commandline -t | grep -E -q "$pattern"
+    commandline -tr (echo -n "$history[1]" | sed -e (commandline -t)/g)
+  else
+    commandline -f complete
+  end
+end
+