Minor refactoring, typo fixes.

tests/test_requests_html.py

@@ -13,7 +13,7 @@ session.mount('file://', FileAdapter())
 
 def get():
     path = os.path.sep.join((os.path.dirname(os.path.abspath(__file__)), 'python.html'))
-    url = 'file://{}'.format(path)
+    url = f'file://{path}'
 
     return session.get(url)
 
@@ -290,16 +290,24 @@ async def test_bare_js_async_eval():
 
 
 def test_browser_session():
-    """ Test browser instaces is created and properly close when session is closed.
+    """ Test browser instances is created and properly close when session is closed.
         Note: session.close method need to be tested together with browser creation,
-            since no doing that will left the browser running. """
+            since not doing that will leave the browser running. """
     session = HTMLSession()
     assert isinstance(session.browser, Browser)
-    assert hasattr(session, "loop") == True
+    assert hasattr(session, "loop")
     session.close()
     # assert count_chromium_process() == 0
 
 
+def test_browser_process():
+    for _ in range(3):
+        r = get()
+        r.html.render()
+
+        assert r.html.page is None
+
+
 @pytest.mark.asyncio
 async def test_browser_session_fail():
     """ HTMLSession.browser should not be call within an existing event loop> """
@@ -308,21 +316,9 @@ async def test_browser_session_fail():
         session.browser
 
 
-def test_browser_process():
-    for _ in range(3):
-        r = get()
-        r.html.render()
-
-        assert r.html.page == None
-
-
 @pytest.mark.asyncio
 async def test_async_browser_session():
     session = AsyncHTMLSession()
     browser = await session.browser
     assert isinstance(browser, Browser)
     await session.close()
-
-
-if __name__ == '__main__':
-    test_containing()