diff -r 000000000000 -r 783eff3047bc test/compatibility/periods.tst
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compatibility/periods.tst	Sat Oct 05 21:37:31 2013 +0100
@@ -0,0 +1,37 @@
+**************** INPUT ****************
+"Say, it took more than two minutes to deliver that book," remarked Dick
+. "We were just getting ready to go on without you."
+
+Common abbreviations shouldn't be warned about. Mr. and Mrs. are used for
+individuals, as is Dr. and Mssrs. is used for a number of people. MSS. is
+an abbreviation of manuscripts, whereas st. and lb. (and its plural lbs.)
+are weights and ft. is for feet.
+
+In more scholarly work, we have pp. for pages, cf. for confer (compare),
+vs. for verses, vol. for volume (and its plural vols.), ed. for edition,
+viz. for videlicet (that is), op. cit. for opus citatum est (already
+cited), and chap. for chapter.
+
+In mathematics, we come across deg. for degrees and min. for minutes. When
+we turn to business, we might meet ltd. for limited and cent. and its
+plural cents. for centum (hundred).
+
+In more general usage, we have pm. for post meridiem (afternoon) and etc.
+for et cetera (and others).
+
+If we coin our own abbreviatn. then we should be warned about it exactly
+once, no matter how many times that abbreviatn. is used.
+
+Acronyms like M.P. shouldn't generate any warnings, unless we get confused
+and write M .P. by mistake.
+
+**************** EXPECTED ****************
+
+. "We were just getting ready to go on without you."
+    Line 2 column 1 - Begins with punctuation?
+
+If we coin our own abbreviatn. then we should be warned about it exactly
+    Line 21 column 30 - Extra period?
+
+and write M .P. by mistake.
+    Line 25 column 13 - Spaced punctuation?