add usage example to filters docs

paularmstrong · Oct 2, 2011 · 223256b · 223256b
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diff --git a/docs/filters.md b/docs/filters.md
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 Used to modify variables. Filters are added directly after variable names, separated by the pipe (|) character. You can chain multiple filters together, applying one after the other in succession.
 
+## Example
+
+    {{ name|title }} was born on {{ birthday|date('F jS, Y') }} and has {{ bikes|length|default("zero") }} bikes.
+
 ## Built-In Filters
 
 ### add(value)