diff: simplify allow-indentation-change delta calculation

Now that we reliably end a block when the sign changes we don't need
the whitespace delta calculation to rely on the sign.

Signed-off-by: Phillip Wood <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: phillipwood

diff.c

@@ -864,23 +864,17 @@ static int compute_ws_delta(const struct emitted_diff_symbol *a,
 	    a_width = a->indent_width,
 	    b_off = b->indent_off,
 	    b_width = b->indent_width;
-	int delta;
 
 	if (a_width == INDENT_BLANKLINE && b_width == INDENT_BLANKLINE) {
 		*out = INDENT_BLANKLINE;
 		return 1;
 	}
 
-	if (a->s == DIFF_SYMBOL_PLUS)
-		delta = a_width - b_width;
-	else
-		delta = b_width - a_width;
-
 	if (a_len - a_off != b_len - b_off ||
 	    memcmp(a->line + a_off, b->line + b_off, a_len - a_off))
 		return 0;
 
-	*out = delta;
+	*out = a_width - b_width;
 
 	return 1;
 }
@@ -924,10 +918,7 @@ static int cmp_in_block_with_wsd(const struct diff_options *o,
 	 * match those of the current block and that the text of 'l' and 'cur'
 	 * after the indentation match.
 	 */
-	if (cur->es->s == DIFF_SYMBOL_PLUS)
-		delta = a_width - c_width;
-	else
-		delta = c_width - a_width;
+	delta = c_width - a_width;
 
 	/*
 	 * If the previous lines of this block were all blank then set its