8quote._~23~25kernel%29._string~3f%29%29" class="RktValLink" data-pltdoc="x">string?</a></span><span class="hspace">&nbsp;</span>=<span class="hspace">&nbsp;</span><span class="RktVal">""</span></td></tr><tr><td><span class="hspace">&nbsp;&nbsp;</span><span class="RktVar">transform</span><span class="hspace">&nbsp;</span>:<span class="hspace">&nbsp;</span><span class="RktSym"><a href="file:///Applications/Racket%20v6.4/doc/reference/strings.html#%28def._%28%28quote._~23~25kernel%29._string~3f%29%29" class="