Notepad++ makes it very easy to find and replace characters in a file, especially regular expressions makes it a very powerful text editor for software developers in order to replace all spaces with dots in a file you can make use of the Repace feature,
- Open your file in Notepad++, or text in a tab,
- Now press Command + H to open Replace,
- In Search Mode, select Regular Expression,
- Find what: \s
- Replace with: .
- Click - Replace All

192 168 0 1
After:
192.168.0.1
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