Whitespace in build.cmd arguments can cause build failure

[nategraf]

The command:
build.cmd release x64␣enforcepgo -priority=1
build correctly, but
build.cmd release x64␣␣enforcepgo -priority=1 (Two spaces between x64 and enforcepgo)
will fail with the [1] as it's output.

This was first on this Jenkins build

[1]

Tools are already initialized.
Running: C:\Users\vigraf\coreclr\Tools\dotnetcli\dotnet.exe C:\Users\vigraf\coreclr\Tools\run.exe C:\Users\vigraf\coreclr\config.json build -Project=C:\Users\vigraf\coreclr\bin\obj\Windows_NT.x64.Release\install.vcxproj -MsBuildLog=/flp:Verbosity=normal;LogFile="C:\Users\vigraf\coreclr\bin\Logs\CoreCLR_Windows_NT__x64__Release.log" -MsBuildWrn=/flp1:WarningsOnly;LogFile="C:\Users\vigraf\coreclr\bin\Logs\CoreCLR_Windows_NT__x64__Release.wrn" -MsBuildErr=/flp2:ErrorsOnly;LogFile="C:\Users\vigraf\coreclr\bin\Logs\CoreCLR_Windows_NT__x64__Release.err" -configuration=Release  -BuildOS=Windows_NT -BuildType=Release -BuildArch=x64  release x64 enforcepgo  skiptests -priority=1
Error: Parameter not recognized: release.
Our dev workflow has changed! Use -? for help in the new options we have and how to pass parameters now.
BUILD: Error: native component build failed. Refer to the build log files for details:
    "C:\Users\vigraf\coreclr\bin\Logs\CoreCLR_Windows_NT__x64__Release.log"
    "C:\Users\vigraf\coreclr\bin\Logs\CoreCLR_Windows_NT__x64__Release.wrn"
    "C:\Users\vigraf\coreclr\bin\Logs\CoreCLR_Windows_NT__x64__Release.err"

Connected: 13275

[nategraf]

It is an issue in build.cmd Jose and Daniel helped me track it down, and dotnet/coreclr#13320 is a fix