qmake generates incorrect Xcode project when TARGET has spaces in it

When generating an Xcode project from a pro file that has a target where the string has a space character in it,
the resulting xcode project fails to build.

Reproducible with:

make a simple project,
In the pro file include
TARGET = "My Application"
generate Xcode project, try to compile in Xcode

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qmake ends up generating the following script that appears in the 'Qt Qmake' step of the application target in Xcode:

make -C /Users/user/MyApp -f My Application.xcodeproj/qt_makeqmake.mak

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it should be (notice the quotes):

make -C /Users/user/MyApp -f "My Application.xcodeproj/qt_makeqmake.mak"