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Merge pull requestJack-Lee-Hiter#6 from wangershi/patch-2

Update 替换空格.py

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Original file line number	Diff line number	Diff line change
`@@ -6,6 +6,20 @@`
`6`	`6`	`# -- coding:utf-8 --`
`7`	`7`	`classSolution:`
`8`	`8`	`# s 源字符串`
	`9`	`+`
	`10`	`+# 使用append一次遍历即可替换`
	`11`	`+# 由于list的append是O(1)的时间复杂度，除了扩容所导致的时间损耗，该算法复杂度为O(n)`
	`12`	`+defreplaceSpaceByAppend(self,s):`
	`13`	`+string=list(string)`
	`14`	`+stringReplace= []`
	`15`	`+foriteminstring:`
	`16`	`+ifitem==' ':`
	`17`	`+stringReplace.append('%')`
	`18`	`+stringReplace.append('2')`
	`19`	`+stringReplace.append('0')`
	`20`	`+else:`
	`21`	`+stringReplace.append(item)`
	`22`	`+return"".join(stringReplace)`
`9`	`23`
`10`	`24`	`# 创建新的字符串进行替换`
`11`	`25`	`defreplaceSpace1(self,s):`

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