histedit: Speed up scrolling in patch view mode
Store patchcontents into the mode state, avoiding the expensive
call to ui for computing the patchcontents.
Before this change in large repos histedit patch view mode can
be very irresponsive.
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true
[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false