[clang-format] Multi-line macro doesn't respect `ColumnLimit: 0`

[KarthikNayak]

I noticed that multi-line macros don't respect the ColumnLimit: 0 setting.

So the following:

#define PACK_REFS_OPTS(spaces)                                                        \
	"[--all] [--no-prune] [--auto] [--include <pattern>] [--exclude <pattern>]\n" \
	spaces "[--required]"

is always requested to be changed like:

 #define PACK_REFS_OPTS_SPACES_14 "              "
 #define PACK_REFS_OPTS_SPACES_18 "                  "
-#define PACK_REFS_OPTS(spaces)                                                        \
-	"[--all] [--no-prune] [--auto] [--include <pattern>] [--exclude <pattern>]\n" \
-	spaces "[--required]"
+#define PACK_REFS_OPTS(spaces)                                                 \
+  "[--all] [--no-prune] [--auto] [--include <pattern>] [--exclude "            \
+  "<pattern>]\n" spaces "[--required]"

[llvmbot]

@llvm/issue-subscribers-clang-format

Author: Karthik Nayak (KarthikNayak)

I noticed that multi-line macros don't respect the `ColumnLimit: 0` setting.

So the following:

#define PACK_REFS_OPTS(spaces)                                                        \
	"[--all] [--no-prune] [--auto] [--include <pattern>] [--exclude <pattern>]\n" \
	spaces "[--required]"

is always requested to be changed like:

 #define PACK_REFS_OPTS_SPACES_14 "              "
 #define PACK_REFS_OPTS_SPACES_18 "                  "
-#define PACK_REFS_OPTS(spaces)                                                        \
-	"[--all] [--no-prune] [--auto] [--include <pattern>] [--exclude <pattern>]\n" \
-	spaces "[--required]"
+#define PACK_REFS_OPTS(spaces)                                                 \
+  "[--all] [--no-prune] [--auto] [--include <pattern>] [--exclude "            \
+  "<pattern>]\n" spaces "[--required]"