c-sentence-end-with-esc-eol

c-sentence-end-with-esc-eol is a variable defined in `cc-vars.el'.
Its value is

"\\(\\(\\([.?!][]\"'”)}]*\\($\\|[  ]$\\|	\\|[  ][  ]\\)\\|[。．？！]+\\)[  	\n]*\\)\\|[.?!][]\"')}]* ?\\\\\\($\\)[ 	\n]*\\)"

Documentation:
Value used like sentence-end used when scanning strings.
It treats escaped EOLs as whitespace.