uls(Uppercase Lowercase Shifting),用于将文本文件中的ASCII字符中的字母
进行大小写转换,共4种转换:
全转为大写;全转为小写;单词首字符大写;大小写互换(大写变小写,小写变大写).如下为程序包内的README说明文件:
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What is uls
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uls is a text utility to translate between the uppercase and the lowercase o