Use same directory for OS.File.moveAtomic() temp file

Using the main temp directory was causing writes to fail when storage
was on another filesystem.

chrome/content/zotero/xpcom/file.js

@@ -381,13 +381,7 @@ Zotero.File = new function(){
 				path,
 				data,
 				{
-					// Note: this will fail on Windows if the temp
+					tmpPath: path + ".tmp",
-					// directory is on a different drive from
-					// destination path
-					tmpPath: OS.Path.join(
-						Zotero.getTempDirectory().path,
-						OS.Path.basename(path) + ".tmp"
-					),
 					encoding: charset ? charset.toLowerCase() : 'utf-8'
 				}
 			));

test/tests/fileTest.js

@@ -82,6 +82,20 @@ describe("Zotero.File", function () {
 		});
 	});
 	
+	describe("#putContentsAsync()", function () {
+		it("should save via .tmp file", function* () {
+			var tmpDir = yield getTempDirectory();
+			var destFile = OS.Path.join(tmpDir, 'test.txt')
+			var tmpFile = destFile + ".tmp";
+			yield Zotero.File.putContentsAsync(tmpFile, 'A');
+			assert.isTrue(yield OS.File.exists(tmpFile));
+			yield Zotero.File.putContentsAsync(destFile, 'B');
+			assert.isFalse(yield OS.File.exists(tmpFile));
+			// Make sure .tmp file created when creating temp file was deleted too
+			assert.isFalse(yield OS.File.exists(tmpFile + '.tmp'));
+		});
+	});
+	
 	describe("#copyDirectory()", function () {
 		it("should copy all files within a directory", function* () {
 			var tmpDir = Zotero.getTempDirectory().path;