Merge pull request bitcoin#3430 from ldenman/patch-1

Fix typo in unit-tests.md

Author: sipa

doc/unit-tests.md

@@ -12,7 +12,7 @@ To add more bitcoind tests, add `BOOST_AUTO_TEST_CASE` functions to the existing
 .cpp files in the test/ directory or add new .cpp files that
 implement new BOOST_AUTO_TEST_SUITE sections.
 
-To run the bitcoin-qt tests manualy, launch src/qt/test/bitcoin-qt_test
+To run the bitcoin-qt tests manually, launch src/qt/test/bitcoin-qt_test
 
 To add more bitcoin-qt tests, add them to the `src/qt/test/` directory and
 the `src/qt/test/test_main.cpp` file.