Clarify what a string being empty means
@@ -381,7 +381,7 @@
<return type="bool">
</return>
<description>
- Returns [code]true[/code] if the string is empty.
+ Returns [code]true[/code] if the length of the string equals [code]0[/code].
</description>
</method>
<method name="ends_with">