revert(3p/git): Revert merge of git upstream at v2.26.2

This causes cgit to serve error pages, which is undesirable.

This reverts commit 5229c9b232, reversing
changes made to f2b211131f.

third_party/git/t/t9902-completion.sh

@@ -28,10 +28,10 @@ complete ()
 #
 # (2) A test makes sure that common subcommands are included in the
 #     completion for "git <TAB>", and a plumbing is excluded.  "add",
-#     "rebase" and "ls-files" are listed for this.
+#     "filter-branch" and "ls-files" are listed for this.
 
-GIT_TESTING_ALL_COMMAND_LIST='add checkout check-attr rebase ls-files'
-GIT_TESTING_PORCELAIN_COMMAND_LIST='add checkout rebase'
+GIT_TESTING_ALL_COMMAND_LIST='add checkout check-attr filter-branch ls-files'
+GIT_TESTING_PORCELAIN_COMMAND_LIST='add checkout filter-branch'
 
 . "$GIT_BUILD_DIR/contrib/completion/git-completion.bash"
 
@@ -378,7 +378,7 @@ test_expect_success '__gitdir - finds repo' '
 '
 
 
-test_expect_success '__gitdir - returns error when cannot find repo' '
+test_expect_success '__gitdir - returns error when cant find repo' '
 	(
 		__git_dir="non-existing" &&
 		test_must_fail __gitdir >"$actual"
@@ -945,7 +945,7 @@ test_expect_success 'setup for filtering matching refs' '
 	rm -f .git/FETCH_HEAD
 '
 
-test_expect_success '__git_refs - do not filter refs unless told so' '
+test_expect_success '__git_refs - dont filter refs unless told so' '
 	cat >expected <<-EOF &&
 	HEAD
 	master
@@ -1257,7 +1257,7 @@ test_path_completion ()
 		# In the following tests calling this function we only
 		# care about how __git_complete_index_file() deals with
 		# unusual characters in path names.  By requesting only
-		# untracked files we do not have to bother adding any
+		# untracked files we dont have to bother adding any
 		# paths to the index in those tests.
 		__git_complete_index_file --others &&
 		print_comp
@@ -1363,63 +1363,6 @@ test_expect_success 'teardown after path completion tests' '
 	       BS\\dir '$'separators\034in\035dir''
 '
 
-test_expect_success '__git_find_on_cmdline - single match' '
-	echo list >expect &&
-	(
-		words=(git command --opt list) &&
-		cword=${#words[@]} &&
-		__git_find_on_cmdline "add list remove" >actual
-	) &&
-	test_cmp expect actual
-'
-
-test_expect_success '__git_find_on_cmdline - multiple matches' '
-	echo remove >expect &&
-	(
-		words=(git command -o --opt remove list add) &&
-		cword=${#words[@]} &&
-		__git_find_on_cmdline "add list remove" >actual
-	) &&
-	test_cmp expect actual
-'
-
-test_expect_success '__git_find_on_cmdline - no match' '
-	(
-		words=(git command --opt branch) &&
-		cword=${#words[@]} &&
-		__git_find_on_cmdline "add list remove" >actual
-	) &&
-	test_must_be_empty actual
-'
-
-test_expect_success '__git_find_on_cmdline - single match with index' '
-	echo "3 list" >expect &&
-	(
-		words=(git command --opt list) &&
-		cword=${#words[@]} &&
-		__git_find_on_cmdline --show-idx "add list remove" >actual
-	) &&
-	test_cmp expect actual
-'
-
-test_expect_success '__git_find_on_cmdline - multiple matches with index' '
-	echo "4 remove" >expect &&
-	(
-		words=(git command -o --opt remove list add) &&
-		cword=${#words[@]} &&
-		__git_find_on_cmdline --show-idx "add list remove" >actual
-	) &&
-	test_cmp expect actual
-'
-
-test_expect_success '__git_find_on_cmdline - no match with index' '
-	(
-		words=(git command --opt branch) &&
-		cword=${#words[@]} &&
-		__git_find_on_cmdline --show-idx "add list remove" >actual
-	) &&
-	test_must_be_empty actual
-'
 
 test_expect_success '__git_get_config_variables' '
 	cat >expect <<-EOF &&
@@ -1449,12 +1392,12 @@ test_expect_success 'basic' '
 	# built-in
 	grep -q "^add \$" out &&
 	# script
-	grep -q "^rebase \$" out &&
+	grep -q "^filter-branch \$" out &&
 	# plumbing
 	! grep -q "^ls-files \$" out &&
 
-	run_completion "git r" &&
-	! grep -q -v "^r" out
+	run_completion "git f" &&
+	! grep -q -v "^f" out
 '
 
 test_expect_success 'double dash "git" itself' '
@@ -1495,8 +1438,6 @@ test_expect_success 'double dash "git checkout"' '
 	--no-guess Z
 	--no-... Z
 	--overlay Z
-	--pathspec-file-nul Z
-	--pathspec-from-file=Z
 	EOF
 '
 
@@ -1607,10 +1548,7 @@ test_expect_success 'complete tree filename with metacharacters' '
 '
 
 test_expect_success PERL 'send-email' '
-	test_completion "git send-email --cov" <<-\EOF &&
-	--cover-from-description=Z
-	--cover-letter Z
-	EOF
+	test_completion "git send-email --cov" "--cover-letter " &&
 	test_completion "git send-email ma" "master "
 '
 
@@ -1760,69 +1698,6 @@ do
 	'
 done
 
-test_expect_success 'git config - section' '
-	test_completion "git config br" <<-\EOF
-	branch.Z
-	browser.Z
-	EOF
-'
-
-test_expect_success 'git config - variable name' '
-	test_completion "git config log.d" <<-\EOF
-	log.date Z
-	log.decorate Z
-	EOF
-'
-
-test_expect_success 'git config - value' '
-	test_completion "git config color.pager " <<-\EOF
-	false Z
-	true Z
-	EOF
-'
-
-test_expect_success 'git -c - section' '
-	test_completion "git -c br" <<-\EOF
-	branch.Z
-	browser.Z
-	EOF
-'
-
-test_expect_success 'git -c - variable name' '
-	test_completion "git -c log.d" <<-\EOF
-	log.date=Z
-	log.decorate=Z
-	EOF
-'
-
-test_expect_success 'git -c - value' '
-	test_completion "git -c color.pager=" <<-\EOF
-	false Z
-	true Z
-	EOF
-'
-
-test_expect_success 'git clone --config= - section' '
-	test_completion "git clone --config=br" <<-\EOF
-	branch.Z
-	browser.Z
-	EOF
-'
-
-test_expect_success 'git clone --config= - variable name' '
-	test_completion "git clone --config=log.d" <<-\EOF
-	log.date=Z
-	log.decorate=Z
-	EOF
-'
-
-test_expect_success 'git clone --config= - value' '
-	test_completion "git clone --config=color.pager=" <<-\EOF
-	false Z
-	true Z
-	EOF
-'
-
 test_expect_success 'sourcing the completion script clears cached commands' '
 	__git_compute_all_commands &&
 	verbose test -n "$__git_all_commands" &&