Fix comments in last commit.

Reported by Paul Eggert.

* build-aux/useless-if-before-free: Fix comment regarding the second line.
* build-aux/announce-gen: Likewise.
* build-aux/gitlog-to-changelog: Likewise.
* build-aux/prefix-gnulib-mk: Likewise.
* build-aux/update-copyright: Likewise.
* tests/test-update-copyright.sh: Update test program accordingly.

6 files changed, 36 insertions, 36 deletions

diff --git a/build-aux/announce-gen b/build-aux/announce-gen
index b5728338c7..bbcaa1ab32 100755
--- a/build-aux/announce-gen
+++ b/build-aux/announce-gen
@@ -6,12 +6,12 @@
 # or execvp() fails with ENOEXEC if it is a script that does not start
 # with a #! line.  The script interpreter mentioned in the #! line has
 # to be /bin/sh, because on GuixSD systems that is the only program that
-# has a fixed file name.  The second line is for editing this file in
-# Emacs.  The next two lines below are valid code in both sh and perl.
-# When executed by sh, they re-execute the script through the perl
-# program found in $PATH.  The '-x' option is essential; without it,
-# perl would re-execute the script through /bin/sh.  When executed by
-# perl, the next two lines are a no-op.
+# has a fixed file name.  The second line is essential for perl and is
+# also useful for editing this file in Emacs.  The next two lines below
+# are valid code in both sh and perl.  When executed by sh, they re-execute
+# the script through the perl program found in $PATH.  The '-x' option
+# is essential as well; without it, perl would re-execute the script
+# through /bin/sh.  When executed by  perl, the next two lines are a no-op.
 eval 'exec perl -wSx "$0" "$@"'
      if 0;
 
diff --git a/build-aux/gitlog-to-changelog b/build-aux/gitlog-to-changelog
index a616b82343..b2780efbeb 100755
--- a/build-aux/gitlog-to-changelog
+++ b/build-aux/gitlog-to-changelog
@@ -6,12 +6,12 @@
 # or execvp() fails with ENOEXEC if it is a script that does not start
 # with a #! line.  The script interpreter mentioned in the #! line has
 # to be /bin/sh, because on GuixSD systems that is the only program that
-# has a fixed file name.  The second line is for editing this file in
-# Emacs.  The next two lines below are valid code in both sh and perl.
-# When executed by sh, they re-execute the script through the perl
-# program found in $PATH.  The '-x' option is essential; without it,
-# perl would re-execute the script through /bin/sh.  When executed by
-# perl, the next two lines are a no-op.
+# has a fixed file name.  The second line is essential for perl and is
+# also useful for editing this file in Emacs.  The next two lines below
+# are valid code in both sh and perl.  When executed by sh, they re-execute
+# the script through the perl program found in $PATH.  The '-x' option
+# is essential as well; without it, perl would re-execute the script
+# through /bin/sh.  When executed by  perl, the next two lines are a no-op.
 eval 'exec perl -wSx "$0" "$@"'
      if 0;
 
diff --git a/build-aux/prefix-gnulib-mk b/build-aux/prefix-gnulib-mk
index 66e138b46f..864f3bf029 100755
--- a/build-aux/prefix-gnulib-mk
+++ b/build-aux/prefix-gnulib-mk
@@ -6,12 +6,12 @@
 # or execvp() fails with ENOEXEC if it is a script that does not start
 # with a #! line.  The script interpreter mentioned in the #! line has
 # to be /bin/sh, because on GuixSD systems that is the only program that
-# has a fixed file name.  The second line is for editing this file in
-# Emacs.  The next two lines below are valid code in both sh and perl.
-# When executed by sh, they re-execute the script through the perl
-# program found in $PATH.  The '-x' option is essential; without it,
-# perl would re-execute the script through /bin/sh.  When executed by
-# perl, the next two lines are a no-op.
+# has a fixed file name.  The second line is essential for perl and is
+# also useful for editing this file in Emacs.  The next two lines below
+# are valid code in both sh and perl.  When executed by sh, they re-execute
+# the script through the perl program found in $PATH.  The '-x' option
+# is essential as well; without it, perl would re-execute the script
+# through /bin/sh.  When executed by  perl, the next two lines are a no-op.
 eval 'exec perl -wSx "$0" "$@"'
      if 0;
 
diff --git a/build-aux/update-copyright b/build-aux/update-copyright
index fa9d427e92..063500d417 100755
--- a/build-aux/update-copyright
+++ b/build-aux/update-copyright
@@ -6,12 +6,12 @@
 # or execvp() fails with ENOEXEC if it is a script that does not start
 # with a #! line.  The script interpreter mentioned in the #! line has
 # to be /bin/sh, because on GuixSD systems that is the only program that
-# has a fixed file name.  The second line is for editing this file in
-# Emacs.  The next two lines below are valid code in both sh and perl.
-# When executed by sh, they re-execute the script through the perl
-# program found in $PATH.  The '-x' option is essential; without it,
-# perl would re-execute the script through /bin/sh.  When executed by
-# perl, the next two lines are a no-op.
+# has a fixed file name.  The second line is essential for perl and is
+# also useful for editing this file in Emacs.  The next two lines below
+# are valid code in both sh and perl.  When executed by sh, they re-execute
+# the script through the perl program found in $PATH.  The '-x' option
+# is essential as well; without it, perl would re-execute the script
+# through /bin/sh.  When executed by  perl, the next two lines are a no-op.
 eval 'exec perl -wSx "$0" "$@"'
      if 0;
 
diff --git a/build-aux/useless-if-before-free b/build-aux/useless-if-before-free
index 0701e7b20b..88a787c761 100755
--- a/build-aux/useless-if-before-free
+++ b/build-aux/useless-if-before-free
@@ -6,12 +6,12 @@
 # or execvp() fails with ENOEXEC if it is a script that does not start
 # with a #! line.  The script interpreter mentioned in the #! line has
 # to be /bin/sh, because on GuixSD systems that is the only program that
-# has a fixed file name.  The second line is for editing this file in
-# Emacs.  The next two lines below are valid code in both sh and perl.
-# When executed by sh, they re-execute the script through the perl
-# program found in $PATH.  The '-x' option is essential; without it,
-# perl would re-execute the script through /bin/sh.  When executed by
-# perl, the next two lines are a no-op.
+# has a fixed file name.  The second line is essential for perl and is
+# also useful for editing this file in Emacs.  The next two lines below
+# are valid code in both sh and perl.  When executed by sh, they re-execute
+# the script through the perl program found in $PATH.  The '-x' option
+# is essential as well; without it, perl would re-execute the script
+# through /bin/sh.  When executed by  perl, the next two lines are a no-op.
 eval 'exec perl -wSx "$0" "$@"'
      if 0;
 
diff --git a/tests/test-update-copyright.sh b/tests/test-update-copyright.sh
index 9ef5344ead..5950e508b3 100755
--- a/tests/test-update-copyright.sh
+++ b/tests/test-update-copyright.sh
@@ -45,12 +45,12 @@ cat <<\EOF > $s
 # or execvp() fails with ENOEXEC if it is a script that does not start
 # with a #! line.  The script interpreter mentioned in the #! line has
 # to be /bin/sh, because on GuixSD systems that is the only program that
-# has a fixed file name.  The second line is for editing this file in
-# Emacs.  The next two lines below are valid code in both sh and perl.
-# When executed by sh, they re-execute the script through the perl
-# program found in $PATH.  The '-x' option is essential; without it,
-# perl would re-execute the script through /bin/sh.  When executed by
-# perl, the next two lines are a no-op.
+# has a fixed file name.  The second line is essential for perl and is
+# also useful for editing this file in Emacs.  The next two lines below
+# are valid code in both sh and perl.  When executed by sh, they re-execute
+# the script through the perl program found in $PATH.  The '-x' option
+# is essential as well; without it, perl would re-execute the script
+# through /bin/sh.  When executed by  perl, the next two lines are a no-op.
 eval 'exec perl -wSx "$0" "$@"'
      if 0;