I work at the unix command line (bash shell) on a Mac 10.6.8. In a text file, I want to replace all multiple newlines, even if the newlines have other whitespace between them, with EEEEE. All single newlines I want to leave alone. Thus the following file, called textfile:
must be transformed into
But as you see from the example below, the following regular expression, issued at the command line, doesn't do it.
Here is the example:
> cat textfile
> perl -p -e 's/\n\s*\n/EEEEE/g' textfile
Is there a simple or elegant solution?
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