[check] find, exists with text with underscore does find full text

[Philip Lo]

There are many known problems with the standard use of text search and OCR based on Tesseract in version 1. This will only be addressed later in version 2.

Users of SikuliX 1.1.x have to live with the weaknesses of the feature.

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Sikuli version 1.1.1
windows 10 64-bit

procedure:
in notepad create 2 lines:
somethinghippyfox
sheep_elephant

run this code:
click_next = exists('sheep_elephant')
if click_next:
    print("found")
else:
    print("can not find")

Script will not find 'sheep_elephant'. Script will find 'somethinghippfox' and 'sheep_e'