"$PWD" = "PWD", >! doesn't work, echo is redundant. Fixed all.

plugins/last-working-dir/last-working-dir.plugin.zsh

@@ -9,8 +9,8 @@ local cache_file="$ZSH/cache/last-working-dir"
 
 # Updates the last directory once directory is changed.
 function chpwd() {
-  # Use >! in case noclobber is set to avoid "file exists" error
-	echo "$PWD" >! "$cache_file"
+  # Use >| in case noclobber is set to avoid "file exists" error
+	pwd >| "$cache_file"
 }
 
 # Changes directory to the last working directory.