fix Issue #1890: [vim] Double clicking a word to select it selects an ex...

This patch is a fix to Issue #1890. It also resolves another bug that is following:

Bug: In normal mode of Vim, triple clicking any character selects whole line and the first character on the next line. So when we do cut/copy operation that character on the next line gets also involved in the operation.

This patch resolves this bug too.