Your solution, @coises, seems to work only if :

• A single "......" section exists in current line

• Line-ending char(s) end(s) the current line

@uhax-the-grey, the difficulty to achive that general goal is that the ending char of a section is the SAME char than its beginning char ( the " character ) :-((

So I propose to split the problem in 3 successive steps :

• First, we change any couple of " chars, of a single section, with two different control chars ( \x02 and \x03 )

• Secondly, we use the generic regex mechanism, described here, to replace any \t character by a space char, in "............" sections only

• Finally, we restore the two original " delimiters for each section

This method leads to the 3 successive regex S/R below :

SEARCH (?s)"(.*?)"

REPLACE \x02\1\x03

Then :

SEARCH (?:\x02|(?!\A)\G)(?s:(?!\x03).)*?\K\t

REPLACE \x20

Remark : Do not forget to move the caret ( cursor ) at the very beginning of the current file, before running this second S/R !

Finally :

SEARCH [\x02\x03]

REPLACE "

Whatever the position of the TAB chars and the " deleimiters, thoughout the text contents, this method should always work properly !

Best Regards,

guy038

From the main menu, select Search | Replace…; then fill in:

Find what: \t(?=[^\r\n"]*+"[^\r\n"]*+[\r\n])
Replace with: (a single space)
Search Mode: Regular expression

then click Replace All.

This assumes that each line in your text either has no double quote marks or has two double quote marks. If there are other cases (such as lines with two quoted strings, or quoted strings that span lines) this will not work.