Require an automatic subscript to start with a number.

diff --git a/pret-lam.lua b/pret-lam.lua
index d44c5b3933b1302d60a8d9bd19d484dc43c4a6f2..3cc01af4ec20358b0bfe064410254e9e1be64160 100644 (file)
--- a/pret-lam.lua
+++ b/pret-lam.lua
@@ -197,7 +197,7 @@ function vis.begin_of_display()
     if in_block == 0 then
         -- Initially allow subscripts using _ or just appending a number (later,
         -- we will add extra patterns here.
-        submatches = {"^(%a*)_([%a%d,]+)$", "^(%a+)([%d,]+)$"}
+        submatches = {"^(%a*)_([%a%d,]+)$", "^(%a+)(%d[%d,]+)$"}
         -- This stores all the bases we've encountered so far (to prevent
         -- duplicates). For each of them there will be a pattern in submatches
         -- above.