Merge branch 'maint'

* maint:
t0050: fix printf format strings for portability
t3419-*.sh: Fix arithmetic expansion syntax error

diff --combined t/t0050-filesystem.sh
index 057c97c49f26c354e25675e4489c0e94917de33f,07357ee1fc2902d72cd4f524404862036d06f613..1542cf6a1313963fccdf42702c620be9e05f7143
--- 1/t/t0050-filesystem.sh
--- 2/t/t0050-filesystem.sh
+++ b/t/t0050-filesystem.sh
@@@ -4,22 -4,22 +4,22 @@@ test_description='Various filesystem is
  
  . ./test-lib.sh
  
- auml=`printf '\xc3\xa4'`
- aumlcdiar=`printf '\x61\xcc\x88'`
+ auml=$(printf '\303\244')
+ aumlcdiar=$(printf '\141\314\210')
  
  case_insensitive=
  unibad=
  no_symlinks=
  test_expect_success 'see what we expect' '
  
 -      test_case=test_expect_success
 -      test_unicode=test_expect_success
 +      test_case=test_expect_success &&
 +      test_unicode=test_expect_success &&
        mkdir junk &&
        echo good >junk/CamelCase &&
        echo bad >junk/camelcase &&
        if test "$(cat junk/CamelCase)" != good
        then
 -              test_case=test_expect_failure
 +              test_case=test_expect_failure &&
                case_insensitive=t
        fi &&
        rm -fr junk &&
@@@ -27,7 -27,7 +27,7 @@@
        >junk/"$auml" &&
        case "$(cd junk && echo *)" in
        "$aumlcdiar")
 -              test_unicode=test_expect_failure
 +              test_unicode=test_expect_failure &&
                unibad=t
                ;;
        *)      ;;
@@@ -36,7 -36,7 +36,7 @@@
        {
                ln -s x y 2> /dev/null &&
                test -h y 2> /dev/null ||
 -              no_symlinks=1
 +              no_symlinks=1 &&
                rm -f y
        }
  '
@@@ -128,7 -128,7 +128,7 @@@ test_expect_success "setup unicode norm
    cd unicode &&
    touch "$aumlcdiar" &&
    git add "$aumlcdiar" &&
 -  git commit -m initial
 +  git commit -m initial &&
    git tag initial &&
    git checkout -b topic &&
    git mv $aumlcdiar tmp &&