Merge branch 'sm/mv-dry-run-update'

Code clean-up.

* sm/mv-dry-run-update:
  mv: remove unneeded 'if (!show_only)'
  t7001: add test case for --dry-run

t/t7001-mv.sh

@@ -38,6 +38,12 @@ test_expect_success \
     'git diff-tree -r -M --name-status  HEAD^ HEAD | \
     grep "^R100..*path1/COPYING..*path0/COPYING"'
 
+test_expect_success \
+    'mv --dry-run does not move file' \
+    'git mv -n path0/COPYING MOVED &&
+     test -f path0/COPYING &&
+     test ! -f MOVED'
+
 test_expect_success \
     'checking -k on non-existing file' \
     'git mv -k idontexist path0'