[PATCH] Avoid using `echo -n` anywhere

[Lukas Fleischer <git@cryptocrack.de>]

`echo -n` is non-portable. The POSIX specification says:

    Conforming applications that wish to do prompting without <newline>
    characters or that could possibly be expecting to echo a -n, should
    use the printf utility derived from the Ninth Edition system.

Since all of the affected shell scripts use a POSIX shell shebang,
replace `echo -n` invocations with printf.

Signed-off-by: Lukas Fleischer <git@cryptocrack.de>
---
 contrib/subtree/git-subtree.sh     | 2 +-
 contrib/subtree/t/t7900-subtree.sh | 8 ++++----
 t/perf/perf-lib.sh                 | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
index 51ae932..7d7af03 100755
--- a/contrib/subtree/git-subtree.sh
+++ b/contrib/subtree/git-subtree.sh
@@ -311,7 +311,7 @@ copy_commit()
 			GIT_COMMITTER_NAME \
 			GIT_COMMITTER_EMAIL \
 			GIT_COMMITTER_DATE
-		(echo -n "$annotate"; cat ) |
+		(printf "%s" "$annotate"; cat ) |
 		git commit-tree "$2" $3  # reads the rest of stdin
 	) || die "Can't copy commit $1"
 }
diff --git a/contrib/subtree/t/t7900-subtree.sh b/contrib/subtree/t/t7900-subtree.sh
index b0f8536..556a94d 100755
--- a/contrib/subtree/t/t7900-subtree.sh
+++ b/contrib/subtree/t/t7900-subtree.sh
@@ -182,9 +182,9 @@ test_expect_success 'merge new subproj history into subdir' '
 test_expect_success 'Check that prefix argument is required for split' '
         echo "You must provide the --prefix option." > expected &&
         test_must_fail git subtree split > actual 2>&1 &&
-        test_debug "echo -n expected: " &&
+        test_debug "printf '"'"'expected: '"'"'" &&
         test_debug "cat expected" &&
-        test_debug "echo -n actual: " &&
+        test_debug "printf '"'"'actual: '"'"'" &&
         test_debug "cat actual" &&
         test_cmp expected actual &&
         rm -f expected actual
@@ -193,9 +193,9 @@ test_expect_success 'Check that prefix argument is required for split' '
 test_expect_success 'Check that the <prefix> exists for a split' '
         echo "'"'"'non-existent-directory'"'"'" does not exist\; use "'"'"'git subtree add'"'"'" > expected &&
         test_must_fail git subtree split --prefix=non-existent-directory > actual 2>&1 &&
-        test_debug "echo -n expected: " &&
+        test_debug "printf '"'"'expected: '"'"'" &&
         test_debug "cat expected" &&
-        test_debug "echo -n actual: " &&
+        test_debug "printf '"'"'actual: '"'"'" &&
         test_debug "cat actual" &&
         test_cmp expected actual
 #        rm -f expected actual
diff --git a/t/perf/perf-lib.sh b/t/perf/perf-lib.sh
index c61d535..ae44117 100644
--- a/t/perf/perf-lib.sh
+++ b/t/perf/perf-lib.sh
@@ -161,7 +161,7 @@ test_perf () {
 		echo "$test_count" >>"$perf_results_dir"/$base.subtests
 		echo "$1" >"$perf_results_dir"/$base.$test_count.descr
 		if test -z "$verbose"; then
-			echo -n "perf $test_count - $1:"
+			printf "%s" "perf $test_count - $1:"
 		else
 			echo "perf $test_count - $1:"
 		fi
@@ -170,7 +170,7 @@ test_perf () {
 			if test_run_perf_ "$2"
 			then
 				if test -z "$verbose"; then
-					echo -n " $i"
+					printf " %d" "$i"
 				else
 					echo "* timing run $i/$GIT_PERF_REPEAT_COUNT:"
 				fi
-- 
1.8.3.3.1135.ge2c9e63