ed: improve binary listing

[mknos]

• I created a binary test file with bytes 0 to 255
• When listing the file content with "l" command I noticed a difference compared to BSD and GNU version
• The $ character should be listed as \$ because newlines are represented as plain $
• I didn't see a difference for any other characters listed; however the other versions break up long lines (this could be implemented later)

%perl -e'for(0..255){print(chr)}' > in.ed
%echo ',l' | perl ed in.ed
Newline appended
257
\000\001\002\003\004\005\006\a\b\t$
\v\f\r\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037 !"#\$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377$

[coveralls]

Pull Request Test Coverage Report for Build 11361990887

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 73.069%

---

Totals
Change from base Build 11349099383:	-0.7%
Covered Lines:	350
Relevant Lines:	479

---

💛 - Coveralls

[briandfoy]

changes: correctly escape literal $ in binary output