patch 9.0.1627: no generic mechanism to test syntax pluginsv9.0.1627

Problem:    No generic mechanism to test syntax plugins.
Solution:   Add a syntax plugin test mechanism, using screendumps.  Add a
            simple test for "c".

1 files changed, 20 insertions, 0 deletions

diff --git a/runtime/syntax/testdir/dumps/c_03.dump b/runtime/syntax/testdir/dumps/c_03.dump
new file mode 100644
index 0000000000..5f0e8d86a1
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_03.dump
@@ -0,0 +1,20 @@
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+@75
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+|{| @73
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+|@+0#4040ff13&@2| @71
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