remove default argument for readLines (#12807) [backport]

Author: cooldome

compiler/vmops.nim

@@ -147,7 +147,7 @@ proc registerAdditionalOps*(c: PCtx) =
  wrap1s(fileExists, osop)
  wrapDangerous(writeFile, ioop)
  wrap1s(readFile, ioop)
- wrap2si(readLines, ioop)
+ wrap2si(staticReadLines, ioop)
  systemop getCurrentExceptionMsg
  systemop getCurrentException
  registerCallback c, "stdlib.*.staticWalkDir", proc (a: VmArgs) {.nimcall.} =

lib/system/io.nim

@@ -696,10 +696,10 @@ proc writeFile*(filename: string, content: openArray[byte]) {.since: (1, 1).} =
  else:
  raise newException(IOError, "cannot open: " & filename)
 
-proc readLines*(filename: string, n = 1.Natural): seq[TaintedString] =
- ## read `n` lines from the file named `filename`. Raises an IO exception
+proc staticReadLines*(filename: string, n: Natural): seq[TaintedString] =
+ ## Compile time read `n` lines from the file named `filename`. Raises an IO exception
  ## in case of an error. Raises EOF if file does not contain at least `n` lines.
- ## Available at compile time. A line of text may be delimited by ``LF`` or ``CRLF``.
+ ## A line of text may be delimited by ``LF`` or ``CRLF``.
  ## The newline character(s) are not part of the returned strings.
  var f: File
  if open(f, filename):

tests/vm/tfile_rw.nim

@@ -13,7 +13,7 @@ static:
  writeFile(filename, mytext)
 const myfile_str = staticRead(filename)
 const myfile_str2 = readFile(filename)
-const myfile_str_seq = readLines(filename, 3)
+const myfile_str_seq = staticReadLines(filename, 3)
 
 static:
  doAssert myfile_str == mytext