ed: avoid literal newline in s///

[mknos]

• Yesterday when editing a file I discovered the escape sequence "\n" was expanded to a newline when used in a substitution command
• This has the unintended result of updating one or more elements of the lines-list to contain multiple newline characters
• GNU and OpenBSD versions treat "\n" as a regular "n"; follow this for compatibility, and to avoid the problem of line x containing many lines

%perl ed.old -p 'ed>' a.c
623
ed>1
#include <stdio.h>
ed>s/h/\nH\nI\n\nJ\n/
ed>p
#include <stdio.
H
I

J
>
ed>Q
%perl ed.new -p 'ed>' a.c
623
ed>1
#include <stdio.h>
ed>s/h/\nH\nI\n\nJ\n/
ed>p
#include <stdio.nHnInnJn>
ed>Q

[coveralls]

Pull Request Test Coverage Report for Build 12682668341

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.7%) to 73.389%

---

Totals
Change from base Build 12682335465:	-0.7%
Covered Lines:	353
Relevant Lines:	481

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 12682668342

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.7%) to 73.389%

---

Totals
Change from base Build 12682335465:	-0.7%
Covered Lines:	353
Relevant Lines:	481

---

💛 - Coveralls

[briandfoy]

changes: \n in a substitution is now just a literal n, not a newline