Switch double quotes for singles, fixes prompt issues

themes/geoffgarside.zsh-theme

@@ -1,2 +1,2 @@
 # PROMPT="[%*] %n:%c $(git_prompt_info)%(!.#.$) "
-PROMPT="[%*] %{$fg[cyan]%}%n%{$reset_color%}:%{$fg[green]%}%c%{$reset_color%} $(git_prompt_info)%(!.#.$) "
+PROMPT='[%*] %{$fg[cyan]%}%n%{$reset_color%}:%{$fg[green]%}%c%{$reset_color%} $(git_prompt_info)%(!.#.$) '