commit 2c8c681bfcd5138a0ec8ce018216dc2dc69a11a0
author Bram Moolenaar <Bram@vim.org> Sat Jul 28 17:07:52 2018 +0200
committer Bram Moolenaar <Bram@vim.org> Sat Jul 28 17:07:52 2018 +0200
tree 8bacefb197e9c6267098c338013d445d0503b8ca
parent 95e51470f10e1ddcc4b2ce53e4f7ff7aa2e58417

patch 8.1.0219: expanding ## fails to escape backtick

Problem:    Expanding ## fails to escape backtick.
Solution:   Escape a backtick in a file name. (closes #3257)

src/ex_docmd.c

diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 4c653ff..54fb6ab 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -10954,7 +10954,7 @@
 #ifndef BACKSLASH_IN_FILENAME
 			    || *p == '\\'
 #endif
-			    )
+			    || *p == '`')
 		    {
 			/* insert a backslash */
 			if (retval != NULL)

src/testdir/test_edit.vim

diff --git a/src/testdir/test_edit.vim b/src/testdir/test_edit.vim
index ab2fe7c..651f1f8 100644
--- a/src/testdir/test_edit.vim
+++ b/src/testdir/test_edit.vim
@@ -1375,6 +1375,14 @@
   set swapfile&
 endfunc
 
+func Test_edit_backtick()
+  next a\`b c
+  call assert_equal('a`b', expand('%'))
+  next
+  call assert_equal('c', expand('%'))
+  call assert_equal('a\`b c', expand('##'))
+endfunc
+
 func Test_edit_quit()
   edit foo.txt
   split

src/version.c

diff --git a/src/version.c b/src/version.c
index cf7fa29..4ea5c75 100644
--- a/src/version.c
+++ b/src/version.c
@@ -799,6 +799,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    219,
+/**/
     218,
 /**/
     217,