When the server decodes the string, any + character is reverted to a space.
当服务器对这个字符串进行解码时，任何+字符都会被还原成一个空格。
A space character occurring at the end of the string.
空格出现在字符串的结束位置。
Replace sequences of white-space within the string with a single space.
将字符串内的空格序列替换为单个空格。
For each dataset, print out the dataset number, a space, and the string.
为每个数据集，打印出的数据集，空间，和字符串。
The authorization method and a space i. e. "Basic" is then put before the encoded string.
授权的方法和空间，即“基本”然后放在编码的字符串。
The string of white space characters.
字符串包含非空白字符。
Removes leading and trailing white space from a String object instance.
对象实例移除前导空白字符和尾随空白字符。
Removes leading and trailing white space from a String object instance.
对象实例移除前导空白字符和尾随空白字符。
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