Document include guard convention
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@ -514,6 +514,16 @@ namespace {
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source file into account. This allows quoted includes to stand out more when
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source file into account. This allows quoted includes to stand out more when
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the location of the source file actually is relevant.
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the location of the source file actually is relevant.
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- Use include guards to avoid the problem of double inclusion. The header file
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`foo/bar.h` should use the include guard identifier `BITCOIN_FOO_BAR_H`, e.g.
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```c++
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#ifndef BITCOIN_FOO_BAR_H
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#define BITCOIN_FOO_BAR_H
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...
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#endif // BITCOIN_FOO_BAR_H
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```
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GUI
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GUI
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-----
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