View source for Infobox drug/non-ref-space

{{#if:{{{s|}}}|{{#switch:{{KillMarkers|1={{{s|}}}}}
|={{{s|}}}<!-- ref only; no space -->
|{{{s|}}}=&#x20;{{{s|}}}<!-- text only; add space -->
|#default=<!-- mixed ref-text string; check ref position (is initial?) through the initial plain-text character:
 -->{{#if:{{#invoke:String|match
 |s={{{s|}}}
 |pattern=^{{#invoke:String|escapePattern|1={{#invoke:String|sub|s={{KillMarkers|1={{{s|}}}}}|i=1|j=1}}}}
 |plain=false
 |nomatch=
 |ignore_errors=true}}<!-- (but err logically not expected)
   returned a hit, so initial is text; add space -->|&#x20;{{{s|}}}<!--
   returned blank=nomatch so intial is ref; no space -->|{{{s|}}}<!--
 -->}}
}}|<!-- blank in = blank out -->}}<!--

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