[pitivi] docs: Update testing

[Alexandru Băluț <alexbalut src gnome org>]

commit d8a35fadc5757f72c67adac449fdc349471a672e
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Sat Dec 15 00:50:14 2018 +0100

    docs: Update testing
    
    A `-t` argument was missing.

 docs/Testing.md | 16 ++++++++--------
 docs/index.md   |  2 +-
 2 files changed, 9 insertions(+), 9 deletions(-)
---
diff --git a/docs/Testing.md b/docs/Testing.md
index f13ecb77..e1927223 100644
--- a/docs/Testing.md
+++ b/docs/Testing.md
@@ -12,27 +12,27 @@ you want to test more thoroughly.
 
 ## Unit tests
 
-You can run the unit tests with:
+You can run the unit tests with one of:
 
 ```
-ninja -C mesonbuild/ test
+$ ptvtests
 ```
 
 If you want to run only one particular unit test, use (assuming you are in
-our flatpak based environment):
+our flatpak based development environment):
 
 ```
-ptvtests tests.test_project.TestProjectManager.testLoadProjectFailedUnknownFormat
+$ ptvtests -t tests.test_project.TestProjectManager.testLoadProjectFailedUnknownFormat
 ```
 
 Listing tests:
 
 ```
-ptvtests -L
+$ ptvtests -L
 ```
 
-NOTE: If you are not in our environment, replace `ptvtests` with
-`gst-validate-launcher tests/ptv_testsuite.py`.)
+NOTE: If you are not in our dev env, replace `ptvtests` with
+`gst-validate-launcher tests/ptv_testsuite.py`.
 
 ### Writing unit tests
 
@@ -69,5 +69,5 @@ each time Pitivi is used.
 You can run the integration tests with:
 
 ```
-tests/validate-tests/runtests
+$ tests/validate-tests/runtests
 ```
diff --git a/docs/index.md b/docs/index.md
index 7e385071..e594b94a 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -37,7 +37,7 @@ on the website (includes a “Why contribute to Pitivi?” section).
 -   [Setup development environment](HACKING.md) (official and
     easiest way to get your testing/development environment running,
     with pre-built dependencies)
--   The [test suite](Testing.md) (outdated)
+-   The [test suite](Testing.md)
 
 ## Ways to communicate