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Fix typo in trurl.md #143

Job	Run time
macOS	17s
Windows	34s
Linux (default, valgrind, test-memory)	3m 0s
Linux (clang sanitizers, clang, test, clang, -fsanitize=address,undefined,signed-integer-overflow...	28s
Cygwin	2m 5s
	6m 24s

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