hgview #122649 Diff does not appear on windows [validation pending]

The diff deos not appears on windows.

The text box shows one empty line.

priorityimportant
typebug
done in1.8.0
load0.500
load left0.000
closed by#72fc7853ff59 [lib] file diff: fix missing diff (closes #122649)
patch[lib] file diff: fix missing diff (closes #122649) [applied]