bad patch created when I use --ignore-blank-lines option

[Eugen Konkov]

Hello Git,

I add and remove only blank lines at my file:

$ git log -p t/29-cmd_l.t

--- a/t/29-cmd_l.t
+++ b/t/29-cmd_l.t
@@ -218,7 +218,6 @@ __DATA__
 @@ list
 -e:0005  1;    
 -e:0002    2;
-
 -e
     0: use Devel::DbBatch split(/,/,q{list.conf;b 2;a 2 1;s 2;l .;q});;
     1: sub t {
@@ -226,26 +225,26 @@ ab>>2:     2;
     3: }
     4:
    x5: 1;
+
 @@ list from first
 -e:0010  t2();
-
 -e
     0: use Devel::DbBatch split(/,/,q{list.conf;l 0;q});;
     1: sub t0 {
    x2:     1;
     3: }
+
 @@ list from last
 -e:0010  t2();
-
 -e
     14:
     15:
     16:
     17: # Perl implicitly adds one new line after this one
     18:
+
 @@ list middle
 -e:0010  t2();
-
 -e
    x5:     t0();
     6: }



But  when I use --ignore-blank-lines option I see broken patch. I have
not added '-e' line, but it is displayed as it was added. Notice '+-e'

$ git log -p --ignore-blank-lines t/29-cmd_l.t

diff --git a/t/29-cmd_l.t b/t/29-cmd_l.t
index 4b77279..d7739d2 100755
--- a/t/29-cmd_l.t
+++ b/t/29-cmd_l.t
@@ -219,6 +219,7 @@ __DATA__
 -e:0005  1;    
 -e:0002    2;
 
+-e
     0: use Devel::DbBatch split(/,/,q{list.conf;b 2;a 2 1;s 2;l .;q});;
     1: sub t {
 ab>>2:     2;
@@ -228,6 +229,7 @@ ab>>2:     2;
 @@ list from first
 -e:0010  t2();
 
+-e
     0: use Devel::DbBatch split(/,/,q{list.conf;l 0;q});;
     1: sub t0 {
    x2:     1;
@@ -235,6 +237,7 @@ ab>>2:     2;
 @@ list from last
 -e:0010  t2();
 
+-e
     14:
     15:
     16:
@@ -243,6 +246,7 @@ ab>>2:     2;
 @@ list middle
 -e:0010  t2();
 
+-e
    x5:     t0();
     6: }
     7: sub t2 {


$ git --version
git version 2.22.0


-- 
Best regards,
Eugen Konkov