Fix fish_indent leaving colors set/messing up type

After the colorized syntax output in type -a foo, "foo is /usr/..."
would also be colored. (or 'test' in fish_indent foo.fish; echo test).

Make fish_indent reset the color when it's done.

src/fish_indent.cpp

@@ -213,7 +213,7 @@ static std::string ansi_colorize(const wcstring &text,
         }
         writech(text.at(i));
     }
-
+    set_color(rgb_color_t::normal(), rgb_color_t::normal());
     output_set_writer(saved);
     std::string result;
     result.swap(output_receiver);