Add setting for clean multiline prompt

fish_prompt.fish

@@ -36,7 +36,7 @@
 #     set -g theme_color_scheme dark
 #     set -g fish_prompt_pwd_dir_length 0
 #     set -g theme_project_dir_length 1
-#     set -g theme_newline_cursor yes
+#     set -g theme_newline_cursor yes | clean
 
 # ===========================
 # Helper methods
@@ -308,6 +308,8 @@ function __bobthefish_finish_segments -S -d 'Close open prompt segments'
     else
       echo -ns "$__bobthefish_right_arrow_glyph "
     end
+  else if [ "$theme_newline_cursor" = 'clean' ]
+    echo -ens "\n"
   end
 
   set_color normal