autotools: update m4 macro

.pre-commit-config.yaml

@@ -8,7 +8,7 @@ repos:
     rev: v5.0.0
     hooks:
       - id: end-of-file-fixer
-        exclude: '^((contrib|m4)/.*|configure$)'
+        exclude: '^(contrib/.*|configure$)'
       - id: trailing-whitespace
         exclude: '^((LICENSES|contrib)/.*|src/mtime_iso8601\.c$)'
   - repo: https://github.com/pre-commit/mirrors-clang-format

m4/asx_common.m4

@@ -134,4 +134,4 @@ sed "s/'/'\\\\\\\\''/g"`])])])
 #
 AC_DEFUN([ASX_SRCDIRS],
   [AC_REQUIRE_SHELL_FN([acx_subdir_srcdirs_fn], [], [_AC_SRCDIRS(["$[]1"])])dnl
-   acx_subdir_srcdirs_fn $1])
\ No newline at end of file
+   acx_subdir_srcdirs_fn $1])