diff --git a/ChangeLog b/ChangeLog
index ddd626d2..1fa09ead 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2007-10-12  Eric Blake  <ebb9@byu.net>
 
+	Whitespace cleanup.
+	* libltdl/m4/ltsugar.m4: Avoid space-tab in indents.
+	* libltdl/m4/libtool.m4: Avoid trailing space.
+
 	Deal with Autoconf 2.62's semantic change in m4_append.
 	* libltdl/m4/ltsugar.m4 (lt_append): Replace broken versions of
 	m4_append.
diff --git a/libltdl/m4/libtool.m4 b/libltdl/m4/libtool.m4
index 14324ec5..1eaebc79 100644
--- a/libltdl/m4/libtool.m4
+++ b/libltdl/m4/libtool.m4
@@ -2143,7 +2143,7 @@ darwin* | rhapsody*)
   shlibpath_var=DYLD_LIBRARY_PATH
   shrext_cmds='`test .$module = .yes && echo .so || echo .dylib`'
 m4_if([$1], [],[
-  sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/local/lib"]) 
+  sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/local/lib"])
   sys_lib_dlsearch_path_spec='/usr/local/lib /lib /usr/lib'
   ;;
 
@@ -2324,7 +2324,7 @@ linux* | k*bsd*-gnu)
   finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir'
   shlibpath_var=LD_LIBRARY_PATH
   shlibpath_overrides_runpath=no
-  # Some binutils ld are patched to set DT_RUNPATH 
+  # Some binutils ld are patched to set DT_RUNPATH
   save_LDFLAGS=$LDFLAGS
   save_libdir=$libdir
   eval "libdir=/foo; wl=\"$_LT_TAGVAR(lt_prog_compiler_wl, $1)\"; \
@@ -7100,7 +7100,7 @@ func_basename ()
 # perform func_basename and func_dirname in a single function
 # call:
 #   dirname:  Compute the dirname of FILE.  If nonempty,
-#             add APPEND to the result, otherwise set result 
+#             add APPEND to the result, otherwise set result
 #             to NONDIR_REPLACEMENT.
 #             value returned in "$func_dirname_result"
 #   basename: Compute filename of FILE.
@@ -7174,7 +7174,7 @@ func_basename ()
 # perform func_basename and func_dirname in a single function
 # call:
 #   dirname:  Compute the dirname of FILE.  If nonempty,
-#             add APPEND to the result, otherwise set result 
+#             add APPEND to the result, otherwise set result
 #             to NONDIR_REPLACEMENT.
 #             value returned in "$func_dirname_result"
 #   basename: Compute filename of FILE.
diff --git a/libltdl/m4/ltsugar.m4 b/libltdl/m4/ltsugar.m4
index fe994282..239051a6 100644
--- a/libltdl/m4/ltsugar.m4
+++ b/libltdl/m4/ltsugar.m4
@@ -23,7 +23,7 @@ m4_define([lt_join],
 	 [1], [],
 	 [2], [[$2]],
 	 [m4_ifval([$2],
-	 	   [[$2][]m4_foreach(_lt_Arg, lt_car([m4_shiftn(2, $@)]),
+		   [[$2][]m4_foreach(_lt_Arg, lt_car([m4_shiftn(2, $@)]),
 	                   [_$0([$1], _lt_Arg)])],
 		   [$0([$1], m4_shiftn(2, $@))])])[]dnl
 ])
@@ -72,8 +72,8 @@ m4_define([lt_combine],
   [m4_if([$4], [], [],
     [lt_join(m4_quote(m4_default([$1], [[, ]])),
       lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_prefix, [$2],
-       		   [m4_foreach(_Lt_suffix, lt_car([m4_shiftn(3, $@)]),
-		   	       [_Lt_prefix[]$3[]_Lt_suffix ])])))))])])dnl
+		   [m4_foreach(_Lt_suffix, lt_car([m4_shiftn(3, $@)]),
+			       [_Lt_prefix[]$3[]_Lt_suffix ])])))))])])dnl
 ])