I get why Excel does this, but I do not get why they do it even in a TAB delimited file.
tell application "BBEdit"
activate
replace "\" " using " " searching in text 1 of text window 1 options {search mode:literal, starting at top:true, wrap around:false, backwards:false, case sensitive:false, match words:false, extend selection:false}
replace " \"" using " " searching in text 1 of text window 1 options {search mode:literal, starting at top:true, wrap around:false, backwards:false, case sensitive:false, match words:false, extend selection:false}
replace "^\"\\(" using "\\(" searching in text 1 of text window 1 options {search mode:grep, starting at top:true, wrap around:false, backwards:false, case sensitive:false, match words:false, extend selection:false}
replace "^\"" using "" searching in text 1 of text window 1 options {search mode:grep, starting at top:true, wrap around:false, backwards:false, case sensitive:false, match words:false, extend selection:false}
replace "\"$" using "" searching in text 1 of text window 1 options {search mode:grep, starting at top:true, wrap around:false, backwards:false, case sensitive:false, match words:false, extend selection:false}
replace "\"\"" using "\"" searching in text 1 of text window 1 options {search mode:grep, starting at top:true, wrap around:false, backwards:false, case sensitive:false, match words:false, extend selection:false}
end tell