Repeated message with different punctuation and case

The message in line 1520 is different from the ones in lines 542 and 1034, only differ in punctuation and case. Changed 1520 to match 542 and 1034. Message from 1520 should disappear in next "build message" command run.
Merge pull request #2692 from luislobo/patch-1

Repeated message with different punctuation and case