prompt_tag inserts a space after LP_PS1_PREFIX

[nojhan]

The function prompt_tag sets the LP_PS1_PREFIX with a trailing space, but it should not.

Expected Behavior

Spacing should be handled by the themes, allowing for no space at all, or whatever character one want, just as for the other sections.

Current Behavior

prompt_tag inserts the space, which is a problem for themes that do not want spaces (e.g. neon).

Possible Solution

Add the space within the _lp_default_theme_prompt_data function.