Correct the doc for git log --since --before

"By default, “git log” displays author dates as “Date” but then uses commit
dates when given a –since option. That seems like broken defaults to me."
    - http://www.alexpeattie.com/blog/working-with-dates-in-git/

 filter commits by date authored

should be

 filter commits by date committed

Author: freshtonic

inspect/index.html

@@ -73,7 +73,7 @@ <h4>
 
     <h4>
       git log --since --before
-      <small>filter commits by date authored</small>
+      <small>filter commits by date committed</small>
     </h4>
 
     <p>