Guard against min/max being macros in a cross-compiler way #1057
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Guards against min/max being macros.
Sometimes, particularly when Microsoft's windows.h is included, min/max are defined as macros, interfering with use of std::numeric_limits::min() and the like. To guard against this, the function name is wrapped in an extra set of parenthesis, which inhibits function-style macro expansion.
Two separate commits here: one for document.h and one for test code.