Fix Windows tests for long paths in `exec:environment:...`
This commit makes `Win32OperatingSystemTests >> testExec...`
more robust by testing the error code rather than text of
the exception which may change.
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@REM make using lcc compiler
@REM type lcmake, and wait...
@REM do not edit - automatically generated from ProjectDefinition
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make.exe -N -f bc.mak USELCC=1 %1 %2