patch 7.4.1017
Problem: When there is a backslash in an option ":set -=" doesn't work.
Solution: Handle a backslash better. (Jacob Niehus) Add a new test, merge
in old test.
diff --git a/src/option.c b/src/option.c
index c7ef6ee..aca0f31 100644
--- a/src/option.c
+++ b/src/option.c
@@ -4839,9 +4839,15 @@
|| s[i] == NUL))
break;
/* Count backslashes. Only a comma with an
- * even number of backslashes before it is
- * recognized as a separator */
- if (s > origval && s[-1] == '\\')
+ * even number of backslashes or a single
+ * backslash preceded by a comma before it
+ * is recognized as a separator */
+ if ((s > origval + 1
+ && s[-1] == '\\'
+ && s[-2] != ',')
+ || (s == origval + 1
+ && s[-1] == '\\'))
+
++bs;
else
bs = 0;