patch 7.4.1006
Problem:    The fix in patch 7.3.192 is not tested.
Solution:   Add a test, one for each regexp engine. (Elias Diem)
diff --git a/src/testdir/test44.in b/src/testdir/test44.in
index 23bb4f8..44c3ea7 100644
--- a/src/testdir/test44.in
+++ b/src/testdir/test44.in
@@ -44,6 +44,10 @@
 x:" k
 :let @w=':%s#comb[i]nations#œ̄ṣ́m̥̄ᾱ̆́#g'
 :@w
+:"
+:" l Test what 7.3.192 fixed
+/^l
+:s/ \?/ /g
 :?^1?,$w! test.out
 :e! test.out
 G:put =matchstr(\"אבגד\", \".\", 0, 2) " ב
@@ -80,3 +84,4 @@
 i aàáâãäåāăąǎǟǡả bḃḇ cçćĉċč dďđḋḏḑ eèéêëēĕėęěẻẽ fḟ gĝğġģǥǧǵḡ hĥħḣḧḩẖ iìíîïĩīĭįǐỉ jĵǰ kķǩḱḵ lĺļľŀłḻ mḿṁ nñńņňʼnṅṉ oòóôõöøōŏőơǒǫǭỏ pṕṗ q rŕŗřṙṟ sśŝşšṡ tţťŧṫṯẗ uùúûüũūŭůűųưǔủ vṽ wŵẁẃẅẇẘ xẋẍ yýÿŷẏẙỳỷỹ zźżžƶẑẕ
 j 0123❤x
 k combinations
+l äö üᾱ̆́