Let VS1 follow U+1031 MYANMAR VOWEL SIGN E

src/hb-ot-shape-complex-myanmar-machine.rl

@@ -70,7 +70,7 @@ k = (Ra As H);			# Kinzi
 c = C|Ra;			# is_consonant
 
 medial_group = MY? MR? MW? MH? As?;
-main_vowel_group = VPre* VAbv* VBlw* A* (DB As?)?;
+main_vowel_group = (VPre.VS?)* VAbv* VBlw* A* (DB As?)?;
 post_vowel_group = VPst MH? As* VAbv* A* (DB As?)?;
 pwo_tone_group = PT A* DB? As?;
 

src/hb-ot-shape-complex-myanmar.cc

@@ -374,6 +374,11 @@ initial_reordering_consonant_syllable (hb_buffer_t *buffer,
       {
 	continue;
       }
+      if (info[i].myanmar_category() == OT_VS)
+      {
+	info[i].myanmar_position() = info[i - 1].myanmar_position();
+	continue;
+      }
 
       if (pos == POS_AFTER_MAIN && info[i].myanmar_category() == OT_VBlw)
       {

test/shaping/README.md

@@ -31,11 +31,11 @@ what this does is:
 $ ./hb-unicode-encode 41 42 43 627 | ./record-test.sh -o=data/in-house/tests/test-name.test ../../util/hb-shape font.ttf
 ```
 
-If you created a new test file, add it to `Makefile.am` so it is run.
-Check that `make check` does indeed run it, and that the test passes.
-When everything looks good, `git add` the new font as well as new
-test file if you created any.  You can see what new files are there
-by running `git status data/in-house`.  And commit!
+If you created a new test file, add it to `data/in-house/Makefile.sources`
+so it is run.  Check that `make check` does indeed run it, and that the
+test passes.  When everything looks good, `git add` the new font as well
+as the new test file if you created any.  You can see what new files are
+there by running `git status data/in-house`.  And commit!
 
 *Note!*  Please only add tests using Open Source fonts, preferably under
 OFL or similar license.

test/shaping/data/in-house/Makefile.sources

@@ -29,6 +29,7 @@ TESTS = \
 	tests/mark-attachment.tests \
 	tests/mark-filtering-sets.tests \
 	tests/mongolian-variation-selector.tests \
+	tests/myanmar-syllable.tests \
 	tests/spaces.tests \
 	tests/simple.tests \
 	tests/tibetan-contractions-1.tests \

test/shaping/data/in-house/tests/myanmar-syllable.tests

@@ -0,0 +1 @@
+../fonts/af3086380b743099c54a3b11b96766039ea62fcd.ttf:--no-glyph-names:U+101D,U+FE00,U+1031,U+FE00,U+1031,U+FE00:[6=0+465|6=0+465|5=0+502]