chainlint.sed: improve ?!AMP?! placement accuracy

When chainlint.sed detects a broken &&-chain, it places an ?!AMP?!
annotation at the beginning of the line. However, this is an unusual
location for programmers accustomed to error messages (from compilers,
for instance) indicating the exact point of the problem. Therefore,
relocate the ?!AMP?! annotation to the end of the line in order to
better direct the programmer's attention to the source of the problem.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/chainlint.sed

@@ -236,7 +236,7 @@ s/.*\n//
 # line ends with pipe "...|" -- valid; not missing "&&"
 /|[ 	]*$/bcont
 # missing end-of-line "&&" -- mark suspect
-/&&[ 	]*$/!s/^/?!AMP?!/
+/&&[ 	]*$/!s/$/ ?!AMP?!/
 :cont
 # retrieve and print previous line
 x
@@ -303,7 +303,7 @@ bcase
 # that line legitimately lacks "&&"
 :else
 x
-s/?!AMP?!//
+s/ ?!AMP?!$//
 x
 bcont
 
@@ -311,7 +311,7 @@ bcont
 # "suspect" from final contained line since that line legitimately lacks "&&"
 :done
 x
-s/?!AMP?!//
+s/ ?!AMP?!$//
 x
 # is 'done' or 'fi' cuddled with ")" to close subshell?
 /done.*)/bclose
@@ -354,7 +354,7 @@ bblock
 # since that line legitimately lacks "&&" and exit subshell loop
 :clssolo
 x
-s/?!AMP?!//
+s/ ?!AMP?!$//
 p
 x
 s/^/>/

t/chainlint/arithmetic-expansion.expect

@@ -4,6 +4,6 @@
 	baz
 >) &&
 (
-?!AMP?!	bar=$((42 + 1))
+	bar=$((42 + 1)) ?!AMP?!
 	baz
 >)

t/chainlint/block.expect

@@ -7,6 +7,6 @@
 	bar &&
 	{
 		echo c
-?!AMP?!	}
+	} ?!AMP?!
 	baz
 >)

t/chainlint/broken-chain.expect

@@ -1,6 +1,6 @@
 (
 	foo &&
-?!AMP?!	bar
+	bar ?!AMP?!
 	baz &&
 	wop
 >)

t/chainlint/case.expect

@@ -9,11 +9,11 @@
 	case "$x" in
 	x) foo ;;
 	*) bar ;;
-?!AMP?!	esac
+	esac ?!AMP?!
 	foobar
 >) &&
 (
 	case "$x" in 1) true;; esac &&
-?!AMP?!	case "$y" in 2) false;; esac
+	case "$y" in 2) false;; esac ?!AMP?!
 	foobar
 >)

t/chainlint/command-substitution.expect

@@ -4,6 +4,6 @@
 	baz
 >) &&
 (
-?!AMP?!	bar=$(gobble blocks)
+	bar=$(gobble blocks) ?!AMP?!
 	baz
 >)

t/chainlint/cuddled.expect

@@ -4,7 +4,7 @@ cd foo &&
 >) &&
 
 (
-?!AMP?!cd foo
+cd foo ?!AMP?!
 	bar
 >) &&
 
@@ -17,5 +17,5 @@ cd foo &&
 >	bar) &&
 
 (
-?!AMP?!cd foo
+cd foo ?!AMP?!
 >	bar)

t/chainlint/for-loop.expect

@@ -1,9 +1,9 @@
 (
 	for i in a b c
 	do
-?!AMP?!		echo $i
+		echo $i ?!AMP?!
 		cat
-?!AMP?!	done
+	done ?!AMP?!
 	for i in a b c; do
 		echo $i &&
 		cat $i

t/chainlint/here-doc-multi-line-command-subst.expect

@@ -1,5 +1,5 @@
 (
 	x=$(bobble &&
-?!AMP?!>>		wiffle)
+>>		wiffle) ?!AMP?!
 	echo $x
 >)

t/chainlint/here-doc-multi-line-string.expect

@@ -1,4 +1,4 @@
 (
-?!AMP?!	cat && echo "multi-line	string"
+	cat && echo "multi-line	string" ?!AMP?!
 	bap
 >)

t/chainlint/if-in-loop.expect

@@ -3,10 +3,10 @@
 	do
 		if false
 		then
-?!AMP?!			echo "err"
+			echo "err" ?!AMP?!
 			exit 1
-?!AMP?!		fi
+		fi ?!AMP?!
 		foo
-?!AMP?!	done
+	done ?!AMP?!
 	bar
 >)

t/chainlint/if-then-else.expect

@@ -1,7 +1,7 @@
 (
 	if test -n ""
 	then
-?!AMP?!		echo very
+		echo very ?!AMP?!
 		echo empty
 	elif test -z ""
 	then
@@ -9,7 +9,7 @@
 	else
 		echo foo &&
 		cat
-?!AMP?!	fi
+	fi ?!AMP?!
 	echo poodle
 >) &&
 (

t/chainlint/inline-comment.expect

@@ -1,6 +1,6 @@
 (
 	foobar &&
-?!AMP?!	barfoo
+	barfoo ?!AMP?!
 	flibble "not a # comment"
 >) &&
 

t/chainlint/loop-in-if.expect

@@ -3,10 +3,10 @@
 	then
 		while true
 		do
-?!AMP?!			echo "pop"
+			echo "pop" ?!AMP?!
 			echo "glup"
-?!AMP?!		done
+		done ?!AMP?!
 		foo
-?!AMP?!	fi
+	fi ?!AMP?!
 	bar
 >)

t/chainlint/multi-line-string.expect

@@ -1,6 +1,6 @@
 (
 	x="line 1		line 2		line 3" &&
-?!AMP?!	y="line 1		line2"
+	y="line 1		line2" ?!AMP?!
 	foobar
 >) &&
 (

t/chainlint/nested-cuddled-subshell.expect

@@ -4,16 +4,16 @@
 >>	) &&
 	(cd foo &&
 		bar
-?!AMP?!>>	)
+>>	) ?!AMP?!
 	(
 		cd foo &&
 >>		bar) &&
 	(
 		cd foo &&
-?!AMP?!>>		bar)
+>>		bar) ?!AMP?!
 	(cd foo &&
 >>		bar) &&
 	(cd foo &&
-?!AMP?!>>		bar)
+>>		bar) ?!AMP?!
 	foobar
 >)

t/chainlint/nested-here-doc.expect

@@ -2,6 +2,6 @@ cat >foop &&
 
 (
 	cat &&
-?!AMP?!	cat
+	cat ?!AMP?!
 	foobar
 >)

t/chainlint/nested-subshell-comment.expect

@@ -6,6 +6,6 @@
 		# minor numbers of cows (or do they?)
 		baz &&
 		snaff
-?!AMP?!>>	)
+>>	) ?!AMP?!
 	fuzzy
 >)

t/chainlint/pipe.expect

@@ -3,6 +3,6 @@
 	bar |
 	baz &&
 	fish |
-?!AMP?!	cow
+	cow ?!AMP?!
 	sunder
 >)

t/chainlint/semicolon.expect

@@ -1,5 +1,5 @@
 (
-?!AMP?!?!SEMI?!	cat foo ; echo bar
+?!SEMI?!	cat foo ; echo bar ?!AMP?!
 ?!SEMI?!	cat foo ; echo bar
 >) &&
 (

t/chainlint/subshell-here-doc.expect

@@ -1,6 +1,6 @@
 (
 	echo wobba 	       gorgo snoot 	       wafta snurb &&
-?!AMP?!	cat >bip
+	cat >bip ?!AMP?!
 	echo >bop
 >) &&
 (

t/chainlint/subshell-one-liner.expect

@@ -8,7 +8,7 @@
 	(foo || exit 1) &&
 	(foo || exit 1) |
 	(foo || exit 1) >baz &&
-?!AMP?!	(foo && bar)
-?!AMP?!?!SEMI?!	(foo && bar; baz)
+	(foo && bar) ?!AMP?!
+?!SEMI?!	(foo && bar; baz) ?!AMP?!
 	foobar
 >)

t/chainlint/while-loop.expect

@@ -1,9 +1,9 @@
 (
 	while true
 	do
-?!AMP?!		echo foo
+		echo foo ?!AMP?!
 		cat
-?!AMP?!	done
+	done ?!AMP?!
 	while true; do
 		echo foo &&
 		cat bar