Changes
more efficient code
{{#if:{{{cat|}}}
|{{#if:{{{date|}}}
|[[Category:{{{cat}}} {{{preposition|from}}} {{{date}}}]]{{#ifexist:Category:{{{cat}}} {{{preposition|from}}} {{{date}}}|
|[[Category:Articles with invalid date parameter in template]]
}}
|[[Category:{{{cat}}}]]
}}
}}{{#if:{{{all|}}}
|[[Category:{{{all}}}]]
}}
|{{#if:{{{date|}}}
|[[Category:{{{cat}}} {{{preposition|from}}} {{{date}}}]]{{#ifexist:Category:{{{cat}}} {{{preposition|from}}} {{{date}}}|
|[[Category:Articles with invalid date parameter in template]]
}}
|[[Category:{{{cat}}}]]
}}
}}{{#if:{{{all|}}}
|[[Category:{{{all}}}]]
}}
