paste: new applet

function                                             old     new   delta
paste_main                                             -     493    +493
packed_usage                                       31019   31070     +51
applet_names                                        2569    2575      +6
applet_main                                         1484    1488      +4
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 3/0 up/down: 554/0)             Total: 554 bytes

Signed-off-by: Maxime Coste <mawww@kakoune.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

testsuite/paste/paste

@@ -0,0 +1,20 @@
+cat > foo <<EOF
+foo1
+foo2
+foo3
+EOF
+
+cat > bar <<EOF
+bar1
+bar2
+bar3
+EOF
+
+cat > baz <<EOF
+foo1	bar1
+foo2	bar2
+foo3	bar3
+EOF
+
+busybox paste foo bar > qux
+diff -u baz qux

testsuite/paste/paste-back-cuted-lines

@@ -0,0 +1,9 @@
+cat > foo <<EOF
+this is the first line
+this is the second line
+this is the third line
+EOF
+cut -b 1-13 -n foo > foo1
+cut -b 14- -n foo > foo2
+busybox paste -d '\0' foo1 foo2 > bar
+cmp foo bar

testsuite/paste/paste-multi-stdin

@@ -0,0 +1,16 @@
+cat > foo <<EOF
+line1
+line2
+line3
+line4
+line5
+line6
+EOF
+
+cat > bar <<EOF
+line1	line2	line3
+line4	line5	line6
+EOF
+
+busybox paste - - - < foo > baz
+cmp bar baz

testsuite/paste/paste-pairs

@@ -0,0 +1,16 @@
+cat > foo <<EOF
+foo1
+bar1
+foo2
+bar2
+foo3
+EOF
+
+cat > bar <<EOF
+foo1	bar1
+foo2	bar2
+foo3
+EOF
+
+busybox paste -s -d "\t\n" foo > baz
+cmp bar baz

testsuite/paste/paste-separate

@@ -0,0 +1,19 @@
+cat > foo <<EOF
+foo1
+foo2
+foo3
+EOF
+
+cat > bar <<EOF
+bar1
+bar2
+bar3
+EOF
+
+cat > baz <<EOF
+foo1	foo2	foo3
+bar1	bar2	bar3
+EOF
+
+busybox paste -s foo bar > qux
+cmp baz qux