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-rw-r--r--lib/diff.tcl2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/diff.tcl b/lib/diff.tcl
index 52b79e4a1f..4a7138be9c 100644
--- a/lib/diff.tcl
+++ b/lib/diff.tcl
@@ -175,7 +175,7 @@ proc show_diff {path w {lno {}} {scroll_pos {}}} {
lappend cmd -p
lappend cmd --no-color
- if {$repo_config(gui.diffcontext) >= 0} {
+ if {$repo_config(gui.diffcontext) >= 1} {
lappend cmd "-U$repo_config(gui.diffcontext)"
}
if {$w eq $ui_index} {