fix: +3 tests (197/233, 85%) — bigint overflow, var_qmark indent, merge double discard

src/emitter.nim

@@ -621,7 +621,7 @@ proc emitSpecialForm(items: seq[CljVal], indent: int): string =
       if bname.kind != ckSymbol:
         raise newException(EmitterError, "let binding name must be a symbol")
       addToScope(bname.symName)
-      lines.add(indentStr(indent + 1) & "let " & mangleName(bname.symName) & " = " & emitExpr(bval, 0))
+      lines.add(indentStr(indent + 1) & "let " & mangleName(bname.symName) & " = " & emitExpr(bval, indent + 1))
       bi += 2
     let body = items[2..^1]
     for j, b in body:
@@ -1557,7 +1557,8 @@ proc emitBlock(items: seq[CljVal], indent: int, useResult: bool = false): string
       let lastLine = if lastNl == -1: trimmed else: trimmed[lastNl+1..^1].strip()
       # Prepend discard before the first non-empty line
       if firstNl == -1:
-        if stripped.startsWith("let ") or stripped.startsWith("proc ") or stripped.startsWith("var "):
+        if stripped.startsWith("let ") or stripped.startsWith("proc ") or stripped.startsWith("var ") or
+           stripped.startsWith("discard "):
           code = indentStr(indent) & stripped
         else:
           code = indentStr(indent) & "discard " & stripped