Professing themselves to be wise, they became fools.... Romans 1:22
So all they proved below was not "evolution", but rather that the color green became dominant---while the E. coli stayed E. coli... with just more green. In other words the pre-programed Color data built into the E. coli to produce color variation led to green dominating.... but again the E. coli stayed E. coli.....SOMETIMES THESE DARWINIANS ARE SO OPENLY DECEPTIVE THAT EVEN A CHILD CAN SEE THROUGH IT...
"Researchers Jia Zheng, along with Ning Guo and Andreas Wagner, set out to determine how natural selection, operating through a 
fitness-maximizing process, might lead indirectly to increased evolvability, a kind of meta-evolution. To do this, they subjected yellow fluorescent proteins in the bacteria Escherichia coli to different intensities of selection.
In the first phase of their experiment, they put three different populations of yellow fluorescing E. coli through either strong selection, weak selection, or no selection.
--The strong selection amounted to optically sorting and propagating into the next generation only the top 20 percent of green fluorescing organisms.
--For the weak-selection condition, the researchers propagated all green fluorescing organisms, including the weakest.
Not applying selection simply meant propagating the populations forward at random regardless of their fluorescence.
In the second phase, Zheng and his colleagues applied the same 
selection pressure across all three populations in order to have them evolve toward increased green fluorescence. They discovered that strong selection in the first phase, relative to weak selection or no selection, led to more rapid evolution toward the green target in the second phase.
This is curious.
One might assume that strong selection eliminates variability that could contribute to evolvability, whereas weak selection allows for neutral variants to accumulate. The researchers found that strong selection was able to promote the accumulation of foldability-improving mutations......" Nautilus
***The "variants" of colors here means just that. The Codes for the Color Variations. With Green Becoming Dominant. But the E. coli stayed, well, E. coli....