fixes #20553; don't format code for stropping identifier (#20561) [backport]

* fixes #20553; don't format code for stropping identifier

* add tests

* Update nimpretty/tests/expected/simple.nim

(cherry picked from commit 6082b9ea5d)

compiler/layouter.nim

@@ -551,11 +551,15 @@ proc emitTok*(em: var Emitter; L: Lexer; tok: Token) =
     if not preventComment:
       emitComment(em, tok, dontIndent = false)
   of tkIntLit..tkStrLit, tkRStrLit, tkTripleStrLit, tkGStrLit, tkGTripleStrLit, tkCharLit:
-    let lit = fileSection(em.config, em.fid, tok.offsetA, tok.offsetB)
-    if endsInAlpha(em) and tok.tokType notin {tkGStrLit, tkGTripleStrLit}: wrSpace(em)
-    em.lineSpan = countNewlines(lit)
-    if em.lineSpan > 0: calcCol(em, lit)
-    wr em, lit, ltLit
+    if not em.inquote:
+      let lit = fileSection(em.config, em.fid, tok.offsetA, tok.offsetB)
+      if endsInAlpha(em) and tok.tokType notin {tkGStrLit, tkGTripleStrLit}: wrSpace(em)
+      em.lineSpan = countNewlines(lit)
+      if em.lineSpan > 0: calcCol(em, lit)
+      wr em, lit, ltLit
+    else:
+      if endsInAlpha(em): wrSpace(em)
+      wr em, tok.literal, ltLit
   of tkEof: discard
   else:
     let lit = if tok.ident != nil: tok.ident.s else: tok.literal

nimpretty/tests/expected/simple.nim

@@ -16,3 +16,14 @@ proc a() =
 discard ## comment 3
 
 discard # comment 4
+
+
+# bug #20553
+
+let `'hello` = 12
+echo `'hello`
+
+
+proc `'u4`(n: string) =
+  # The leading ' is required.
+  discard

nimpretty/tests/simple.nim

@@ -16,3 +16,14 @@ proc a() =
 discard## comment 3
 
 discard # comment 4
+
+
+# bug #20553
+
+let `'hello` = 12
+echo `'hello`
+
+
+proc `'u4`(n: string) =
+  # The leading ' is required.
+  discard