fix readme

README.md

@@ -162,9 +162,9 @@ defaults () {
 # if needed. Returning 1 will disable this metric and report a warning.
 start () {
   if [ $DIR_SIZE_IN_MB = false ]; then
-    DU_ARGS="-s -m $DIR_SIZE_PATH"
-  else
     DU_ARGS="-s -k $DIR_SIZE_PATH"
+  else
+    DU_ARGS="-s -m $DIR_SIZE_PATH"
   fi
 }
 

lib/main.sh

@@ -116,7 +116,7 @@ main_collect () {
       if is_function __m_${metric_alias}_start; then
         __m_${metric_alias}_start
         if [ $? -ne 0 ]; then
-          echo "Warning: metric '${metric_alias}' is disabled after failing to start"
+          echo "Warning: metric '${metric_alias}' is disabled after it failed to start"
           continue
         fi
       fi