Changed wording for the description and 2nd command

pages/common/diffstat.md

@@ -1,11 +1,11 @@
 # diffstat
 
-> Make histogram of diff-output.
+> Create a histogram from the output of the `diff` command.
 
 - Display changes in a histogram:
 
 `diff {{file1}} {{file2}} | diffstat`
 
-- Display inserted, deleted, modified changes in table format:
+- Display inserted, deleted and modified changes as a table:
 
 `diff {{file1}} {{file2}} | diffstat -t`