evas textblock: remove white space after line-break by a next item

evas textblock: remove white space after line-break by a next item

Summary:
In some cases, white space at end of line is remained after line-break.
This issue is happened when Textblock do word wrap at the next item. Without
spliting a previous text item. Then, Textblock just skipped calling
_layout_item_text_split_strip_white() function.

This patch also fixed a wrong test case based on wrong logic.
The range rectangles shouldn't be overlapped. Because of remained white space,
a meaningless rectangle was added. And it overlapped by next rectangle.
@fix

Test Plan:
Fixed an exising test case for range renctangles.
Run test case.

Reviewers: herdsman, woohyun, raster, cedric, subodh, subodh6129

Subscribers: #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D7204