Fix graphical bug in cypher theme when return status is non-zero

- When the previous command's return status is non-zero and the prompt
  is redrawn, graphical errors sometimes arise due to the fg{red} not
  being escaped.

themes/cypher.zsh-theme

 # Based on evan's prompt
 # Shows the exit status of the last command if non-zero
 # Uses "#" instead of "»" when running with elevated privileges
-PROMPT="%m %{${fg_bold[red]}%}:: %{${fg[green]}%}%3~%(0?. . ${fg[red]}%? )%{${fg[blue]}%}»%{${reset_color}%} "
+PROMPT="%m %{${fg_bold[red]}%}:: %{${fg[green]}%}%3~%(0?. . %{${fg[red]}%}%? )%{${fg[blue]}%}»%{${reset_color}%} "