Ensure no files have trailing whitespace.

examples/uuid/src/main.rs

@@ -32,8 +32,8 @@ lazy_static! {
 
 #[get("/people/<id>")]
 fn people(id: UUID) -> Result<String, String> {
-    // Because UUID implements the Deref trait, we use Deref coercion to 
-    // convert rocket_contrib::UUID to uuid::Uuid.
+    // Because UUID implements the Deref trait, we use Deref coercion to convert
+    // rocket_contrib::UUID to uuid::Uuid.
     Ok(PEOPLE.get(&id)
         .map(|person| format!("We found: {}", person))
         .ok_or(format!("Person not found for UUID: {}", id))?)

scripts/test.sh

@@ -28,7 +28,7 @@ function check_versions_match() {
   done
 }
 
-# Ensures there are not tabs in any file in the directories $@.
+# Ensures there are no tabs in any file.
 function ensure_tab_free() {
   local tab=$(printf '\t')
   local matches=$(grep -I -R "${tab}" $ROOT_DIR | egrep -v '/target|/.git|LICENSE')
@@ -39,6 +39,16 @@ function ensure_tab_free() {
   fi
 }
 
+# Ensures there are no files with trailing whitespace.
+function ensure_trailing_whitespace_free() {
+  local matches=$(egrep -I -R " +$" $ROOT_DIR | egrep -v "/target|/.git")
+  if ! [ -z "${matches}" ]; then
+    echo "Trailing whitespace was found in the following:"
+    echo "${matches}"
+    exit 1
+  fi
+}
+
 function bootstrap_examples() {
   for file in ${EXAMPLES_DIR}/*; do
     if [ -d "${file}" ]; then
@@ -65,6 +75,9 @@ check_versions_match "${LIB_DIR}" "${CODEGEN_DIR}" "${CONTRIB_DIR}"
 echo ":: Checking for tabs..."
 ensure_tab_free
 
+echo ":: Checking for trailing whitespace..."
+ensure_trailing_whitespace_free
+
 echo ":: Updating dependencies..."
 cargo update