patch 9.1.1009: diff feature can be improved
Problem: diff feature can be improved
Solution: include the linematch diff alignment algorithm
(Jonathon)
closes: #9661
Signed-off-by: Jonathon <jonathonwhite@protonmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/dumps/Test_diff_23.dump b/src/testdir/dumps/Test_diff_23.dump
new file mode 100644
index 0000000..25e1750
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_23.dump
@@ -0,0 +1,20 @@
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+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
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+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
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diff --git a/src/testdir/dumps/Test_diff_24.dump b/src/testdir/dumps/Test_diff_24.dump
new file mode 100644
index 0000000..71004bd
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_24.dump
@@ -0,0 +1,20 @@
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diff --git a/src/testdir/dumps/Test_diff_get_put_linematch_1.dump b/src/testdir/dumps/Test_diff_get_put_linematch_1.dump
new file mode 100644
index 0000000..056c4be
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_get_put_linematch_1.dump
@@ -0,0 +1,20 @@
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diff --git a/src/testdir/dumps/Test_diff_get_put_linematch_10.dump b/src/testdir/dumps/Test_diff_get_put_linematch_10.dump
new file mode 100644
index 0000000..f163146
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_get_put_linematch_10.dump
@@ -0,0 +1,20 @@
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diff --git a/src/testdir/dumps/Test_diff_get_put_linematch_11.dump b/src/testdir/dumps/Test_diff_get_put_linematch_11.dump
new file mode 100644
index 0000000..7e78baf
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_get_put_linematch_11.dump
@@ -0,0 +1,20 @@
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diff --git a/src/testdir/dumps/Test_diff_get_put_linematch_12.dump b/src/testdir/dumps/Test_diff_get_put_linematch_12.dump
new file mode 100644
index 0000000..8e9e0c6
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_get_put_linematch_12.dump
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new file mode 100644
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new file mode 100644
index 0000000..9c7d17b
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new file mode 100644
index 0000000..d9b72ad
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new file mode 100644
index 0000000..d4649d2
--- /dev/null
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
index 0000000..cb62a9e
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new file mode 100644
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new file mode 100644
index 0000000..fa85299
--- /dev/null
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new file mode 100644
index 0000000..d99744e
--- /dev/null
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new file mode 100644
index 0000000..3c1674f
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffd7ff255|A+2&#ff404010|B|C|a+0&#ffd7ff255|b|c| @27||+1&#ffffff0| +0#0000e05#a8a8a8255@1|a+0#0000000#ffd7ff255|D+2&#ff404010|E|F|a+0&#ffd7ff255|b|c| @27
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|x+0#0000000#5fd7ff255|y|z| @31
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|x+0#0000000#5fd7ff255|y|z| @31
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|x+0#0000000#5fd7ff255|y|z| @31
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffd7ff255|A+2&#ff404010|B|C|a+0&#ffd7ff255|b|c| @27||+1&#ffffff0| +0#0000e05#a8a8a8255@1|a+0#0000000#ffd7ff255|D+2&#ff404010|E|F|a+0&#ffd7ff255|b|c| @27
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffd7ff255|A+2&#ff404010|B|C|a+0&#ffd7ff255|b|c| @27||+1&#ffffff0| +0#0000e05#a8a8a8255@1|a+0#0000000#ffd7ff255|D+2&#ff404010|E|F|a+0&#ffd7ff255|b|c| @27
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffd7ff255|A+2&#ff404010|B|C|a+0&#ffd7ff255|b|c| @27||+1&#ffffff0| +0#0000e05#a8a8a8255@1|a+0#0000000#ffd7ff255|D+2&#ff404010|E|F|a+0&#ffd7ff255|b|c| @27
+| +0#0000e05#a8a8a8255@1|c+0#0000000#ffffff0|o|m@1|o|n| |l|i|n|e| @23||+1&&| +0#0000e05#a8a8a8255@1|c+0#0000000#ffffff0|o|m@1|o|n| |l|i|n|e| @23
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|D+0#0000000#5fd7ff255|E|F| @31
+| +0#0000e05#a8a8a8255@1|H+2#0000000#ff404010|I|L| +0&#ffd7ff255@31||+1&#ffffff0| +0#0000e05#a8a8a8255@1|G+2#0000000#ff404010|H|I| +0&#ffd7ff255@31
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|s+0#0000000#5fd7ff255|o|m|e|t|h|i|n|g| |e|l|s|e| @20
+| +0#0000e05#a8a8a8255@1|c+0#0000000#ffffff0|o|m@1|o|n| |l|i|n|e| @23||+1&&| +0#0000e05#a8a8a8255@1|c+0#0000000#ffffff0|o|m@1|o|n| |l|i|n|e| @23
+| +0#0000e05#a8a8a8255@1|s+0#0000000#ffffff0|o|m|e|t|h|i|n|g| @25||+1&&| +0#0000e05#a8a8a8255@1|s+0#0000000#ffffff0|o|m|e|t|h|i|n|g| @25
+|X+3&&|d|i|f|i|l|e|1| @10|1|,|1| @11|A|l@1| |X+1&&|d|i|f|i|l|e|2| @10|1|,|1| @11|A|l@1
+|:+0&&|s|e|t| |d|i|f@1|o|p|t|+|=|l|i|n|e|m|a|t|c|h|:|3|0| @48
diff --git a/src/testdir/test_diffmode.vim b/src/testdir/test_diffmode.vim
index bed795e..1c7233e 100644
--- a/src/testdir/test_diffmode.vim
+++ b/src/testdir/test_diffmode.vim
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