fix for printf with broken strtold; fix readline reading specified number of multibyte characters; fix read builtin to deal with invalid utf-8 continuation character as delimiter; turn off -n if supplied at interactive shell invocation

doc/bashref.html

@@ -13651,6 +13651,9 @@ the letters <code class="code">fi</code>.
 <dt><code class="code">%</code></dt>
 <dd><p>The first word matched by the most recent &lsquo;<samp class="samp">?<var class="var">string</var>?</samp>&rsquo; search,
 if the search string begins with a character that is part of a word.
+By default, searches begin at the end of each line and proceed to the
+beginning, so the first word matched is the one closest to the end of
+the line.
 </p>
 </dd>
 <dt><code class="code"><var class="var">x</var>-<var class="var">y</var></code></dt>