fix typo in soy g3doc
just a quick drive-by typo fix. removed the extra work "it".
@@ -158,7 +158,7 @@ attribute. These aren't harmful but they may be undesired, in this case the
">
```
-Now it the line joining algorithm will produce this:
+Now the line joining algorithm will produce this:
```soy
<a href="{$url}" class="foo bar">
