Merge pull request #21775 from luzpaz:typos/gapi

* GAPI: fix various gapi related typos

Fixes source comments and documentation related to gapi code.

* Fix source typos

* Fixed typos requested

* Follow-up typo fix

modules/gapi/misc/python/test/test_gapi_sample_pipelines.py

@@ -187,7 +187,7 @@ try:
                                               blockSize=block_sz,
                                               useHarrisDetector=use_harris_detector, k=k)
             # NB: The operation output is cv::GArray<cv::Pointf>, so it should be mapped
-            # to python paramaters like this: [(1.2, 3.4), (5.2, 3.2)], because the cv::Point2f
+            # to python parameters like this: [(1.2, 3.4), (5.2, 3.2)], because the cv::Point2f
             # according to opencv rules mapped to the tuple and cv::GArray<> mapped to the list.
             # OpenCV returns np.array with shape (n_features, 1, 2), so let's to convert it to list
             # tuples with size == n_features.
@@ -203,7 +203,7 @@ try:
 
             @staticmethod
             def outMeta(desc):
-                raise NotImplementedError("outMeta isn't imlemented")
+                raise NotImplementedError("outMeta isn't implemented")
         return Op
 
 
@@ -605,7 +605,7 @@ try:
             img1 = np.array([1, 2, 3])
 
             # FIXME: Cause Bad variant access.
-            # Need to provide more descriptive error messsage.
+            # Need to provide more descriptive error message.
             with self.assertRaises(Exception): comp.apply(cv.gin(img0, img1),
                                                           args=cv.gapi.compile_args(
                                                               cv.gapi.kernels(GAddImpl)))