diff -uNr gtk-3.22.30/po-properties/en@quot.header gtk-3.22.30.mod/po-properties/en@quot.header
--- gtk-3.22.30/po-properties/en@quot.header	1970-01-01 03:00:00.000000000 +0300
+++ gtk-3.22.30.mod/po-properties/en@quot.header	2018-06-22 20:55:46.584626256 +0300
@@ -0,0 +1,22 @@
+# All this catalog "translates" are quotation characters.
+# The msgids must be ASCII and therefore cannot contain real quotation
+# characters, only substitutes like grave accent (0x60), apostrophe (0x27)
+# and double quote (0x22). These substitutes look strange; see
+# http://www.cl.cam.ac.uk/~mgk25/ucs/quotes.html
+#
+# This catalog translates grave accent (0x60) and apostrophe (0x27) to
+# left single quotation mark (U+2018) and right single quotation mark (U+2019).
+# It also translates pairs of apostrophe (0x27) to
+# left single quotation mark (U+2018) and right single quotation mark (U+2019)
+# and pairs of quotation mark (0x22) to
+# left double quotation mark (U+201C) and right double quotation mark (U+201D).
+#
+# When output to an UTF-8 terminal, the quotation characters appear perfectly.
+# When output to an ISO-8859-1 terminal, the single quotation marks are
+# transliterated to apostrophes (by iconv in glibc 2.2 or newer) or to
+# grave/acute accent (by libiconv), and the double quotation marks are
+# transliterated to 0x22.
+# When output to an ASCII terminal, the single quotation marks are
+# transliterated to apostrophes, and the double quotation marks are
+# transliterated to 0x22.
+#