#77 add docs for xo_emit_field and friends

tests/core/saved/test_01.X.out

@@ -1 +1 @@
-<top><type>ethernet</type><type>bridge</type><type>18u</type><type>24</type><address>0x0</address><port>1</port><address>0x0</address><port>1</port><address>0x0</address><port>1</port><used-percent>12</used-percent><kve_start>0xdeadbeef</kve_start><kve_end>0xcabb1e</kve_end><host>my-box</host><domain>example.com</domain><host>my-box</host><domain>example.com</domain><label>value</label><max-chaos>very</max-chaos><min-chaos>42</min-chaos><some-chaos>[42]</some-chaos><host>my-box</host><domain>example.com</domain><data test="value"><item test2="value2"><sku test3="value3" key="key">GRO-000-415</sku><name key="key">gum</name><sold>1412</sold><in-stock>54</in-stock><on-order>10</on-order></item><item><sku test3="value3" key="key">HRD-000-212</sku><name key="key">rope</name><sold>85</sold><in-stock>4</in-stock><on-order>2</on-order></item><item><sku test3="value3" key="key">HRD-000-517</sku><name key="key">ladder</name><sold>0</sold><in-stock>2</in-stock><on-order>1</on-order></item><item><sku test3="value3" key="key">HRD-000-632</sku><name key="key">bolt</name><sold>4123</sold><in-stock>144</in-stock><on-order>42</on-order></item><item><sku test3="value3" key="key">GRO-000-2331</sku><name key="key">water</name><sold>17</sold><in-stock>14</in-stock><on-order>2</on-order></item></data><data2><item><sku key="key">GRO-000-415</sku><name key="key">gum</name><sold>1412.0</sold><in-stock>54</in-stock><on-order>10</on-order></item><item><sku key="key">HRD-000-212</sku><name key="key">rope</name><sold>85.0</sold><in-stock>4</in-stock><on-order>2</on-order></item><item><sku key="key">HRD-000-517</sku><name key="key">ladder</name><sold>0</sold><in-stock>2</in-stock><on-order>1</on-order></item><item><sku key="key">HRD-000-632</sku><name key="key">bolt</name><sold>4123.0</sold><in-stock>144</in-stock><on-order>42</on-order></item><item><sku key="key">GRO-000-2331</sku><name key="key">water</name><sold>17.0</sold><in-stock>14</in-stock><on-order>2</on-order></item></data2><data3><item><sku key="key">GRO-000-533</sku><name key="key">fish</name><sold>1321.0</sold><in-stock>45</in-stock><on-order>1</on-order></item></data3><data4><item test4="value4">gum</item><item test4="value4">rope</item><item test4="value4">ladder</item><item test4="value4">bolt</item><item test4="value4">water</item></data4><data test="value"><item test2="value2"><sku test3="value3" key="key">GRO-000-415</sku><name key="key">gum</name><sold>1412</sold><on-order>10</on-order><in-stock>54</in-stock></item><item><sku test3="value3" key="key">HRD-000-212</sku><name key="key">rope</name><sold>85</sold><extra>special</extra><on-order>2</on-order><in-stock>4</in-stock></item><item><sku test3="value3" key="key">HRD-000-517</sku><name key="key">ladder</name><sold>0</sold><extra>special</extra><on-order>1</on-order><in-stock>2</in-stock></item><item><sku test3="value3" key="key">HRD-000-632</sku><name key="key">bolt</name><sold>4123</sold><on-order>42</on-order><in-stock>144</in-stock></item><item><sku test3="value3" key="key">GRO-000-2331</sku><name key="key">water</name><sold>17</sold><extra>special</extra><on-order>2</on-order><in-stock>14</in-stock></item></data><cost>425</cost><cost>455</cost><mode>mode</mode><mode_octal>octal</mode_octal><links>links</links><user>user</user><group>group</group><pre>that</pre><links>3</links><post>this</post><mode>/some/file</mode><mode_octal>640</mode_octal><links>1</links><user>user</user><group>group</group></top>
+<top><type>ethernet</type><type>bridge</type><type>18u</type><type>24</type><address>0x0</address><port>1</port><address>0x0</address><port>1</port><address>0x0</address><port>1</port><used-percent>12</used-percent><kve_start>0xdeadbeef</kve_start><kve_end>0xcabb1e</kve_end><host>my-box</host><domain>example.com</domain><host>my-box</host><domain>example.com</domain><label>value</label><max-chaos>very</max-chaos><min-chaos>42</min-chaos><some-chaos>[42]</some-chaos><sku test-attr="attr-value">gum-000-1412</sku><host>my-box</host><domain>example.com</domain><data test="value"><item test2="value2"><sku test3="value3" key="key">GRO-000-415</sku><name key="key">gum</name><sold>1412</sold><in-stock>54</in-stock><on-order>10</on-order></item><item><sku test3="value3" key="key">HRD-000-212</sku><name key="key">rope</name><sold>85</sold><in-stock>4</in-stock><on-order>2</on-order></item><item><sku test3="value3" key="key">HRD-000-517</sku><name key="key">ladder</name><sold>0</sold><in-stock>2</in-stock><on-order>1</on-order></item><item><sku test3="value3" key="key">HRD-000-632</sku><name key="key">bolt</name><sold>4123</sold><in-stock>144</in-stock><on-order>42</on-order></item><item><sku test3="value3" key="key">GRO-000-2331</sku><name key="key">water</name><sold>17</sold><in-stock>14</in-stock><on-order>2</on-order></item></data><data2><item><sku key="key">GRO-000-415</sku><name key="key">gum</name><sold>1412.0</sold><in-stock>54</in-stock><on-order>10</on-order></item><item><sku key="key">HRD-000-212</sku><name key="key">rope</name><sold>85.0</sold><in-stock>4</in-stock><on-order>2</on-order></item><item><sku key="key">HRD-000-517</sku><name key="key">ladder</name><sold>0</sold><in-stock>2</in-stock><on-order>1</on-order></item><item><sku key="key">HRD-000-632</sku><name key="key">bolt</name><sold>4123.0</sold><in-stock>144</in-stock><on-order>42</on-order></item><item><sku key="key">GRO-000-2331</sku><name key="key">water</name><sold>17.0</sold><in-stock>14</in-stock><on-order>2</on-order></item></data2><data3><item><sku key="key">GRO-000-533</sku><name key="key">fish</name><sold>1321.0</sold><in-stock>45</in-stock><on-order>1</on-order></item></data3><data4><item test4="value4">gum</item><item test4="value4">rope</item><item test4="value4">ladder</item><item test4="value4">bolt</item><item test4="value4">water</item></data4><data test="value"><item test2="value2"><sku test3="value3" key="key">GRO-000-415</sku><name key="key">gum</name><sold>1412</sold><on-order>10</on-order><in-stock>54</in-stock></item><item><sku test3="value3" key="key">HRD-000-212</sku><name key="key">rope</name><sold>85</sold><extra>special</extra><on-order>2</on-order><in-stock>4</in-stock></item><item><sku test3="value3" key="key">HRD-000-517</sku><name key="key">ladder</name><sold>0</sold><extra>special</extra><on-order>1</on-order><in-stock>2</in-stock></item><item><sku test3="value3" key="key">HRD-000-632</sku><name key="key">bolt</name><sold>4123</sold><on-order>42</on-order><in-stock>144</in-stock></item><item><sku test3="value3" key="key">GRO-000-2331</sku><name key="key">water</name><sold>17</sold><extra>special</extra><on-order>2</on-order><in-stock>14</in-stock></item></data><cost>425</cost><cost>455</cost><mode>mode</mode><mode_octal>octal</mode_octal><links>links</links><user>user</user><group>group</group><pre>that</pre><links>3</links><post>this</post><mode>/some/file</mode><mode_octal>640</mode_octal><links>1</links><user>user</user><group>group</group></top>