Siddhesh Poyarekar dd3e86ad7c benchtests: Avoid a display error when running in text terminal
The compare_strings.py script generates a graph for the benchmarks it
performs a comparison on and that fails if X is not available.  Avoid
the error and ensure that only the graph is generated and saved as a
PNG file.

	* benchtests/scripts/compare_strings.py: Avoid display error
	when generating graph.
2017-08-08 00:56:10 +05:30
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