Ensure proper type checking/coercion of "${expr}"
Now we only rewrite "${expr}" to expr if expr is a string literal.
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@ -203,7 +203,8 @@ static Expr * stripIndentation(SymbolTable & symbols, vector<Expr *> & es)
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es2->push_back(new ExprString(symbols.create(s2)));
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}
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return es2->size() == 1 ? (*es2)[0] : new ExprConcatStrings(true, es2);
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/* If this is a single string, then don't do a concatenation. */
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return es2->size() == 1 && dynamic_cast<ExprString *>((*es2)[0]) ? (*es2)[0] : new ExprConcatStrings(true, es2);
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}
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@ -359,7 +360,7 @@ expr_simple
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| '"' string_parts '"' {
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/* For efficiency, and to simplify parse trees a bit. */
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if ($2->empty()) $$ = new ExprString(data->symbols.create(""));
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else if ($2->size() == 1) $$ = $2->front();
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else if ($2->size() == 1 && dynamic_cast<ExprString *>($2->front())) $$ = $2->front();
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else $$ = new ExprConcatStrings(true, $2);
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}
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| IND_STRING_OPEN ind_string_parts IND_STRING_CLOSE {
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