Imporoved the regular expression used to match "Tab <tab index>". It now requires tab to be a word and allows for spaces, hyphens, and underscores as seperators.

Matches:
Tab0
Tab 0
Tab-0
Tab_0
Tab - _ - 0

Non-matches:
stab 0
tab 0s
Imporoved the regular expression used to match "Tab <tab index>". It now requires tab to be a word and allows for spaces, hyphens, and underscores as seperators.