Fish: Fall back to simple prompt for dumb terms

fish/config.fish

@@ -28,3 +28,14 @@ end
 
 # Hybrid Vi Mode
 set -g fish_key_bindings hybrid_bindings
+
+# Fix prompt for Emacs TRAMP
+# https://github.com/oh-my-fish/theme-bobthefish/issues/148
+if test "$TERM" = "dumb"
+    function fish_prompt
+        echo "\$ "
+    end
+    function fish_right_prompt; end
+    function fish_greeting; end
+    function fish_title; end
+end