Given a file of source lines that look like the following, I would like to splice together lines with escaped new lines but preserve the line numbers. [tomk]

'''Input File'''
----
 line(1)
 line(2)\
 line with space after excape(3)\    
 line(4)\
 line(5)
 line(6)\
 line(7)
 line(8)
----

'''Solution'''

 set fid [open [file normalize "./filename"] r]
 set text [read ${fid}]
 close $fid
 regsub -all -- {[\\][ \t]*[\n]} ${text} "\\\n" text
 while { [regsub -all -- {[\\][\n](.*?[^\\])[\n]} ${text} "\\1\n\n" text] } {}

'''Result'''
 % puts $text
 line(1)
 line(2)line with space after excape(3)line(4)line(5)
 
 
 
 line(6)line(7)
 
 line(8)
 
 %