Update README.md

Author: datsom1

README.md

@@ -32,20 +32,20 @@ Consider two CSV files:
 `db-diff` can show a human-readable summary of differences between the files:
 
     $ db-diff one.csv two.csv --key=Id
-    1 row changed, 1 row added, 1 row removed
+    1 rows changed, 1 rows added, 1 rows removed
 
-    1 row changed
+    1 rows changed
 
-      Row 1
+      Rows 1
         age: "4" => "5"
 
-    1 row added
+    1 rows added
 
       Id: 3
       name: Bailey
       age: 1
 
-    1 row removed
+    1 rows removed
 
       Id: 2
       name: Pancakes
@@ -60,7 +60,7 @@ You can also feed it JSON files, provided they are a JSON array of objects where
 Use `--show-unchanged` to include full details of the unchanged values for rows with at least one change in the diff output:
 
     % db-diff one.csv two.csv --key=Id --showunchanged
-    1 row changed
+    1 rows changed
 
       Id: 1
         age: "4" => "5"
@@ -114,6 +114,10 @@ You can use the `--output=jsonfile` and `--outputfile=` option to automatically
 You can use the `--time` option to meaure the time it takes:
 
     $ db-diff one.csv two.csv --key=Id --time
+    .
+    .
+    .
+    Elapsed time: 0.016 seconds
 
 ## As a Python library