[PATCH v6 16/21] range-diff --dual-color: skip white-space warnings

From: Johannes Schindelin <redacted>

When displaying a diff of diffs, it is possible that there is an outer
`+` before a context line. That happens when the context changed between
old and new commit. When that context line starts with a tab (after the
space that marks it as context line), our diff machinery spits out a
white-space error (space before tab), but in this case, that is
incorrect.

Rather than adding a specific whitespace flag that specifically ignores
the first space in the output (and might miss other problems with the
white-space warnings), let's just skip handling white-space errors in
dual color mode to begin with.

Signed-off-by: Johannes Schindelin <redacted>
---
 diff.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/diff.c b/diff.c
index e6c857abf..ea8ecae04 100644
--- a/diff.c
+++ b/diff.c

@@ -1299,6 +1299,7 @@ static void emit_diff_symbol_from_struct(struct diff_options *o,
 				set = diff_get_color_opt(o, DIFF_FRAGINFO);
 			else if (c != '+')
 				set = diff_get_color_opt(o, DIFF_CONTEXT);
+			flags &= ~DIFF_SYMBOL_CONTENT_WS_MASK;
 		}
 		emit_line_ws_markup(o, set, reset, line, len, set_sign, '+',
 				    flags & DIFF_SYMBOL_CONTENT_WS_MASK,

-- 
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