Ppxlib_print_diffSourceval print :
?diff_command:string ->
?extra_patdiff_args:string list ->
?use_color:bool ->
file1:string ->
file2:string ->
unit ->
unitDiff two files. Use diff_command to specify what command to use. If not specified patdiff is used, with a fallback to diff -u if patdiff produces no differences.