Fix some warnings caught by the linter

README.md

@@ -1,2 +1,2 @@
 # osmus/tileservice
-Central repo for the OSM US vector tile service
+Central repository for the OSM US vector tile service

renderer/_example.sh

@@ -19,7 +19,7 @@ else
   touch "${LOCKFILE}"
 
   # Ensure the lock file is removed when we exit and when we receive signals
-  trap "rm -f ${LOCKFILE}; trap - SIGTERM && kill -- -$$" SIGINT SIGTERM EXIT
+  trap "rm -f '${LOCKFILE}'; trap - SIGTERM && kill -- -'$$'" SIGINT SIGTERM EXIT
 fi
 
 # The local path to the tileservice repo

renderer/render.sh

@@ -3,4 +3,4 @@
 # Get the directory of the current script
 DIR="$(dirname "$0")"
 
-"$DIR/render_seashells.sh" $1
+"$DIR/render_seashells.sh" "$1"

renderer/render_seashells.sh

@@ -23,7 +23,7 @@ tail -f "$LOG_FILE" | nc seashells.io 1337 > /tmp/seashells_render & sleep 10
 OSM_PLANET_SIZE=$(stat -c%s "$WORKING_DIR/data/sources/planet.osm.pbf")
 
 # Print the size with comma separators
-OSM_PLANET_SIZE=$(printf "%'d" $OSM_PLANET_SIZE)
+OSM_PLANET_SIZE=$(printf "%'d" "$OSM_PLANET_SIZE")
 
 RSS_FILE="$WORKING_DIR/rss.xml"
 PLANET="$WORKING_DIR/data/planet.pmtiles"
@@ -61,7 +61,7 @@ run() {
     PMTILES_PLANET_SIZE=$(stat -c%s "$PLANET")
 
     # Print the size with comma separators
-    PMTILES_PLANET_SIZE=$(printf "%'d" $PMTILES_PLANET_SIZE)
+    PMTILES_PLANET_SIZE=$(printf "%'d" "$PMTILES_PLANET_SIZE")
 
     "$DIR/rss_update.sh" "$RSS_FILE" "Build Complete" "Tiles are up to date as of ${TIMESTAMP}Z. Render took ${HOURS} ${HOUR_TEXT} and ${MINUTES} ${MINUTE_TEXT}. The planet PMTiles file is ${PMTILES_PLANET_SIZE} bytes."
   else