class="external-link">c</a></span><span class="op">(</span><span class="st">"hello"</span>, <span class="cn">NA</span><span class="op">)</span> </span></span>
<span class="r-in"><span><span class="fu">str_fill</span><span class="op">(</span><span class="va">x</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] "hello" "NA   "</span>
<span class="r-in"><span><span class="fu">str_fill</span><span class="op">(</span><span class="va">x</span>, na <span class=