.
++Insert++
.
<p><ins>Insert</ins></p>
.


These are not inserts, you have to use exactly two "++":
.
x +++foo+++

x ++foo+++

x +++foo++
.
<p>x +++foo+++</p>
<p>x ++foo+++</p>
<p>x +++foo++</p>
.

Inserts have the same priority as emphases:

.
**++test**++

++**test++**
.
<p><strong>++test</strong>++</p>
<p><ins>**test</ins>**</p>
.

Inserts have the same priority as emphases with respect to links:
.
[++link]()++

++[link++]()
.
<p><a href="">++link</a>++</p>
<p>++<a href="">link++</a></p>
.

Inserts have the same priority as emphases with respect to backticks:
.
++`code++`

`++code`++
.
<p>++<code>code++</code></p>
<p><code>++code</code>++</p>
.

Nested inserts:
.
++foo ++bar++ baz++
.
<p><ins>foo <ins>bar</ins> baz</ins></p>
.

.
++f **o ++o b++ a** r++
.
<p><ins>f <strong>o <ins>o b</ins> a</strong> r</ins></p>
.

Should not have a whitespace between text and "++":
.
foo ++ bar ++ baz
.
<p>foo ++ bar ++ baz</p>
.


Newline should be considered a whitespace:

.
++test
++

++
test++

++
test
++
.
<p>++test
++</p>
<p>++
test++</p>
<p>++
test
++</p>
.
