Adjust copyright year(s) and shellcheck ignored rules per feedback

gimme

@@ -50,7 +50,7 @@ set -o pipefail
 [[ ${GIMME_DEBUG} ]] && set -x
 
 GIMME_VERSION="v1.3.0"
-GIMME_COPYRIGHT="Copyright (c) 2018 Dan Buch, Tianon Gravi, Travis CI GmbH"
+GIMME_COPYRIGHT="Copyright (c) 2015-2018 Dan Buch, Tianon Gravi, Travis CI GmbH"
 GIMME_LICENSE_URL="https://raw.githubusercontent.com/travis-ci/gimme/v1.3.0/LICENSE"
 export GIMME_VERSION
 export GIMME_COPYRIGHT
@@ -398,7 +398,8 @@ _list_versions() {
 }
 
 _list_known() {
-	local exp="go([[:alnum:]\\.]*)\\.src.*" # :alnum: catches beta versions too
+	# shellcheck disable=SC1117
+	local exp="go([[:alnum:]\.]*)\.src.*" # :alnum: catches beta versions too
 	local list="${GIMME_TMP}/known-versions"
 
 	local known
@@ -408,7 +409,8 @@ _list_known() {
 
 	while read -r line; do
 		if [[ "${line}" =~ ${exp} ]]; then
-			known="$known\\n${BASH_REMATCH[1]}"
+			# shellcheck disable=SC1117
+			known="$known\n${BASH_REMATCH[1]}"
 		fi
 	done <"${list}"
 
@@ -451,7 +453,8 @@ _update_stable() {
 
 	while nextPageToken=$(jq --exit-status --raw-output '.nextPageToken' <"$tmp_versions"); do
 		_do_curl "${url}&pageToken=${nextPageToken}" "${tmp_versions}"
-		vers="${vers}\\n$(jq -r '.items[].name | capture("go(?<ver>[[:digit:]\\.]*)\\.src.*").ver' <"$tmp_versions")"
+		# shellcheck disable=SC1117
+		vers="${vers}\n$(jq -r '.items[].name | capture("go(?<ver>[[:digit:]\\.]*)\\.src.*").ver' <"$tmp_versions")"
 	done
 
 	rm -f "${tmp_versions}" &>/dev/null