Fix handling of backslash

``` let x = '\x31' echo $"${x}" ``` This should print "\x31" not "1".
k-takata · Feb 18, 2020 · ff6882c · ff6882c
1 parent 8b25447
commit ff6882c
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diff --git a/src/eval.c b/src/eval.c
@@ -3846,6 +3846,11 @@ escape_quotes_in_quote(char_u *x, int is_literal_string)
 	    ga_concat(&result, (char_u *) "\\\"");
 	    continue;
 	}
+	else if (!is_literal_string && *p == '\\')
+	{
+	    ga_concat(&result, (char_u *) "\\\\");
+	    continue;
+	}
 	ga_concatn(&result, p, mb_ptr2len(p));
     }
 

diff --git a/src/testdir/test_template_string.vim b/src/testdir/test_template_string.vim
@@ -30,6 +30,8 @@ func Test_template_string_basic()
   call assert_equal("'", $'$x')
   let x = '"'
   call assert_equal('"', $"$x")
+  let x = '\x31'
+  call assert_equal('\x31', $"$x")
   let x20 = 20
   call assert_equal('20', $'$x20')
   let Fo_O0O = 30