Fix: Ensure completion tests are testing last characters on blocks

The tests would not detect that completion was broken when the cursor was on the last character of a Python or Bash région (it has been fixed in the previous commit). Now it should.

integration-tests/project-folder/sources/meta-fixtures/completion.bb

@@ -1,9 +1,9 @@
-DESCRIPTION = 'FOO'
-
 python do_foo(){
-    print('123')
+    pri
 }
 
 do_bar(){
-    echo '123'
+    ech
 }
+
+DESCRIP

integration-tests/src/tests/completion.test.ts

@@ -45,19 +45,19 @@ suite('Bitbake Completion Test Suite', () => {
   }
 
   test('Completion appears properly on bitbake variable', async () => {
-    const position = new vscode.Position(0, 2)
+    const position = new vscode.Position(8, 7)
     const expected = 'DESCRIPTION'
     await testCompletion(position, expected)
   }).timeout(BITBAKE_TIMEOUT)
 
   test('Completion appears properly on embedded python', async () => {
-    const position = new vscode.Position(3, 6)
+    const position = new vscode.Position(1, 7)
     const expected = 'print'
     await testCompletion(position, expected)
   }).timeout(BITBAKE_TIMEOUT)
 
   test('Completion appears properly on embedded bash', async () => {
-    const position = new vscode.Position(7, 6)
+    const position = new vscode.Position(5, 7)
     const expected = 'echo'
     await testCompletion(position, expected)
   }).timeout(BITBAKE_TIMEOUT)