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OMOTO Tsukasa authored
* Support UTF-8 characters in feature name again This commit reverts 0d59859c. Also see: - https://github.com/microsoft/LightGBM/issues/2226 - https://github.com/microsoft/LightGBM/issues/2478 - https://github.com/microsoft/LightGBM/pull/2229 I reproduced the issue and as @kidotaka gave us a great survey in #2226, I don't conclude that the cause is UTF-8, but "an empty string (character)". Therefore, I revert "throw error when meet non ascii (#2229)" whose commit hash is 0d59859c, and add support feture names as UTF-8 again. * add tests * fix check-docs tests * update * fix tests * update .travis.yml * fix tests * update test_r_package.sh * update test_r_package.sh * update test_r_package.sh * add a test for R-package * update test_r_package.sh * update test_r_package.sh * update test_r_package.sh * fix test for R-package * update test_r_package.sh * update test_r_package.sh * update test_r_package.sh * update test_r_package.sh * update * updte * update * remove unneeded comments
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