Index: projects/runtime-coverage/tests/tools/gather_coverage.sh
===================================================================
--- projects/runtime-coverage/tests/tools/gather_coverage.sh	(revision 325212)
+++ projects/runtime-coverage/tests/tools/gather_coverage.sh	(revision 325213)
@@ -1,74 +1,74 @@
 #!/bin/sh
 #
 # Copyright (c) 2017 Ngie Cooper
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1. Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
 #
 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 #
 # $FreeBSD$
 
 # usage: gather_coverage
 
 SCRIPT=${0##*/}
 
 : ${COVERAGE_OUTPUT=coverage-output}
 : ${GCOV=gcov}
 
 error()
 {
-	printf >&2 "${SCRIPT}: ERROR: $@\n"
+	printf >&2 "${SCRIPT}: ERROR: %s\n" "$@"
 }
 
 require_command()
 {
 	local cmd=$1; shift
 
 	if ! command -v $cmd >/dev/null; then
 		error "required command not found: $cmd"
 		if [ $# -gt 0 ]; then
-			printf >&2 "$@\n"
+			printf >&2 "%s\n" "$@"
 		fi
 		exit 1
 	fi
 }
 
 
 
 require_command ${GCOV} \
-    "Install gcov from base or the appropriate version from ports"
+    'Install gcov from base, or specify alternate version, e.g., from ports, using $GCOV.'
 for cmd in lcov genhtml; do
-	require_command ${cmd} "Install devel/lcov from ports"
+	require_command ${cmd} "Install devel/lcov from ports."
 done
 
 if ! COVERAGE_TMP=$(mktemp -d tmp.XXXXXX); then
-	error "failed to create COVERAGE_TMP"
+	error "failed to create COVERAGE_TMP."
 	exit 1
 fi
 trap "rm -Rf '$COVERAGE_TMP'" EXIT INT TERM
 
 set -e
 
 lcov --gcov-tool ${GCOV} --capture --directory ${COVERAGE_TMP} --output-file \
     ${COVERAGE_TMP}/coverage.info
 genhtml ${COVERAGE_TMP}/coverage.info --output-directory ${COVERAGE_OUTPUT}
 
 printf "${SCRIPT}: INFO: coverage output successfully placed in ${COVERAGE_OUTPUT}\n"