calls to GetStyleAt must mask off indicator bits

[rob]

Scintilla's GetStyleAt? (and related) methods return all the styling information, including the indicator bits. So, simply checking that the style is the same as the comment style, for instance, is wrong because an indicator may also be applied to that character.

The proper check is:

    mask = (2**stc.GetStyleBits()) - 1
    style = stc.GetStyleAt(pos) & mask

However, it seems that the end of line character typically won't be marked with an indicator, so if you're only interested in whether or not the line is a multi line comment or multi line string, you can test only the last character.

[rob]

(In [2642]) Refs #423: added style mask to findSameStyle

• was failing on spell-checked comments