Future patches will allow parsing each argument instead of the
hole set. Prepare for it by changing the replace all args from
\1 to \0.

No functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
---
 tools/lib/python/kdoc/kdoc_parser.py | 2 +-
 tools/lib/python/kdoc/kdoc_re.py     | 9 +++++----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index db140363104a..4d52a00acfad 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -160,7 +160,7 @@ struct_xforms = [
 # is allowed.
 #
 struct_nested_prefixes = [
-    (re.compile(r'\bSTRUCT_GROUP\('), r'\1'),
+    (re.compile(r'\bSTRUCT_GROUP\('), r'\0'),
 ]
 
 #
diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index 7b7ddc50ac36..8933e1a62776 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -289,8 +289,9 @@ class NestedMatch:
         It matches a regex that it is followed by a delimiter,
         replacing occurrences only if all delimiters are paired.
 
-        if r'\1' is used, it works just like re: it places there the
-        matched paired data with the delimiter stripped.
+        if r'\0' is used, it works on a similar way of using re.group(0):
+        it places the entire args of the matched paired data, with the
+        delimiter stripped.
 
         If count is different than zero, it will replace at most count
         items.
@@ -306,9 +307,9 @@ class NestedMatch:
             # Value, ignoring start/end delimiters
             value = line[end:pos - 1]
 
-            # replaces \1 at the sub string, if \1 is used there
+            # replaces \0 at the sub string, if \0 is used there
             new_sub = sub
-            new_sub = new_sub.replace(r'\1', value)
+            new_sub = new_sub.replace(r'\0', value)
 
             out += new_sub
 
-- 
2.52.0