Document ScopedTrace utility
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				@ -787,15 +787,17 @@ If a test sub-routine is called from several places, when an assertion
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inside it fails, it can be hard to tell which invocation of the
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sub-routine the failure is from.  You can alleviate this problem using
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extra logging or custom failure messages, but that usually clutters up
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your tests. A better solution is to use the `SCOPED_TRACE` macro:
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your tests. A better solution is to use the `SCOPED_TRACE` macro or
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the `ScopedTrace` utility:
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| `SCOPED_TRACE(`_message_`);` |
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|:-----------------------------|
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| `SCOPED_TRACE(`_message_`);` | `ScopedTrace trace(`_"file\_path"_`, `_line\_number_`, `_message_`);` |
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|:-----------------------------|:----------------------------------------------------------------------|
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where _message_ can be anything streamable to `std::ostream`. This
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macro will cause the current file name, line number, and the given
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message to be added in every failure message. The effect will be
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undone when the control leaves the current lexical scope.
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where `message` can be anything streamable to `std::ostream`. `SCOPED_TRACE`
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macro will cause the current file name, line number, and the given message to be
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added in every failure message. `ScopedTrace` accepts explicit file name and
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line number in arguments, which is useful for writing test helpers. The effect
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will be undone when the control leaves the current lexical scope.
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For example,
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