[bugfix] fix wrong nimpretty unidents, refs #11616 (#11645)

compiler/layouter.nim

@@ -364,7 +364,7 @@ proc emitTok*(em: var Emitter; L: TLexer; tok: TToken) =
       em.indentLevel = tok.indent
     elif (em.lastTok in (splitters + oprSet) and tok.tokType notin closedPars):
       # aka: we are in an expression context:
-      let alignment = tok.indent - em.indentStack[^1]
+      let alignment = max(tok.indent - em.indentStack[^1], 0)
       em.indentLevel = alignment + em.indentStack.high * em.indWidth
     else:
       if tok.indent > em.indentStack[^1]:

nimpretty/tests/exhaustive.nim

@@ -676,3 +676,15 @@ block:
 ## single line comment would be ok.
 block:
   var x = 7
+
+
+proc newRecordGen(ctx: Context; typ: TypRef): PNode =
+  result = nkTypeDef.t(
+    newId(typ.optSym.name, true, pragmas = [id(if typ.isUnion: "cUnion" else: "cStruct")]),
+    empty(),
+    nkObjectTy.t(
+      empty(),
+      empty(),
+      nkRecList.t(
+        typ.recFields.map(newRecFieldGen))))
+

nimpretty/tests/expected/exhaustive.nim

@@ -682,3 +682,16 @@ block:
 ## single line comment would be ok.
 block:
   var x = 7
+
+
+proc newRecordGen(ctx: Context; typ: TypRef): PNode =
+  result = nkTypeDef.t(
+    newId(typ.optSym.name, true, pragmas = [id(
+        if typ.isUnion: "cUnion" else: "cStruct")]),
+    empty(),
+    nkObjectTy.t(
+      empty(),
+      empty(),
+      nkRecList.t(
+        typ.recFields.map(newRecFieldGen))))
+