14f615f5e197c2d922cf5ec6c8349e1614c6f221
Previously the path preview misbehaved when typing dots on the first shell word (e.g. executing a script in a parent directory). This happened as the `(z)` parameter expansion flag does not expand to an array rather a scalar. Because of that, `[-1]` returns the last character. Work around this issue by prepending LBUFFER with a dummy word, so that it always contains at least 2 words.
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$ ./meta/install
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