diff -Nru dh-exec-0.23.3/debian/changelog dh-exec-0.23.3ubuntu1/debian/changelog
--- dh-exec-0.23.3/debian/changelog	2021-03-06 02:39:39.000000000 -0700
+++ dh-exec-0.23.3ubuntu1/debian/changelog	2021-03-30 10:28:56.000000000 -0600
@@ -1,3 +1,11 @@
+dh-exec (0.23.3ubuntu1) hirsute; urgency=medium
+
+  * Fix unintended whitespace removal (LP: #1920825)  Per the tests it's
+    desired to remove the whitespace following a build profile - such as
+    "<A> B" resulting in "B", but leave lines with no build profile alone.
+
+ -- Dan Bungert <daniel.bungert@canonical.com>  Tue, 30 Mar 2021 10:28:56 -0600
+
 dh-exec (0.23.3) unstable; urgency=medium
 
   * QA upload.
diff -Nru dh-exec-0.23.3/debian/control dh-exec-0.23.3ubuntu1/debian/control
--- dh-exec-0.23.3/debian/control	2021-03-06 02:33:27.000000000 -0700
+++ dh-exec-0.23.3ubuntu1/debian/control	2021-03-30 08:54:06.000000000 -0600
@@ -1,7 +1,8 @@
 Source: dh-exec
 Section: devel
 Priority: optional
-Maintainer: Debian QA Group <packages@qa.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian QA Group <packages@qa.debian.org>
 Build-Depends: debhelper (>= 9.20151004~), dh-autoreconf,
                automake (>= 1:1.11),
                libpipeline-dev, pkg-config,
diff -Nru dh-exec-0.23.3/lib/dh-exec-filter-build-profiles dh-exec-0.23.3ubuntu1/lib/dh-exec-filter-build-profiles
--- dh-exec-0.23.3/lib/dh-exec-filter-build-profiles	2016-01-02 09:17:16.000000000 -0700
+++ dh-exec-0.23.3ubuntu1/lib/dh-exec-filter-build-profiles	2021-03-30 10:26:49.000000000 -0600
@@ -36,10 +36,10 @@
     }
     while (/<([^>]*)>/) {
         $line_concerned |= profile_concerned ($1, $_);
-        s/<([^>]*)>//;
+        s/<([^>]*)>\s+//;
     }
 
-    s/(^\s+|\s+$)//;
+    s/\s+$//;
     $_ .= "\n";
 
     if (!$line_concerned) {
diff -Nru dh-exec-0.23.3/t/test_filter.bats dh-exec-0.23.3ubuntu1/t/test_filter.bats
--- dh-exec-0.23.3/t/test_filter.bats	2016-01-02 09:17:16.000000000 -0700
+++ dh-exec-0.23.3ubuntu1/t/test_filter.bats	2021-03-30 10:28:56.000000000 -0600
@@ -192,7 +192,7 @@
         expect_output "this-should-do"
 }
 
-@test "dh-exec-filter: Build Profiles hanles the normal build case" {
+@test "dh-exec-filter: Build Profiles handles the normal build case" {
         if ! build_profile_support; then
                 skip "Build profiles not supported, libdpkg-perl too old"
         fi
@@ -206,3 +206,24 @@
         expect_output "not-stage-1"
         ! expect_output "only-stage-1"
 }
+
+@test "dh-exec-filter: only strip leading whitespace if follows build profile" {
+        if ! build_profile_support; then
+                skip "Build profiles not supported, libdpkg-perl too old"
+        fi
+
+        DEB_BUILD_PROFILES="stage1" \
+                          run_dh_exec_with_input .install <<EOF
+#! ${top_builddir}/src/dh-exec-filter
+  preserve-leading
+<stage1> remove-after-profile
+ preserve-leading-remove-trailing 
+<stage1> remove-after-profile-and-trailing 
+ <stage1> preserve-before-profile-remove-after-and-trailing 
+EOF
+        expect_output "  preserve-leading"
+        expect_output "remove-after-profile"
+        expect_output " preserve-leading-remove-trailing"
+        expect_output "remove-after-profile-and-trailing"
+        expect_output " preserve-before-profile-remove-after-and-trailing"
+}