fix --fit for Windows

Author: a-mr

tools/nimgrep.nim

@@ -1168,6 +1168,8 @@ for kind, key, val in getopt():
     of "fit":
       incl(options, optFit)
       limitChar = terminalWidth()
+      when defined(windows):  # Windows cmd&powershell add an empty line when
+        limitChar -= 1        # printing '\n' right after the last column
     of "onlyascii", "only-ascii", "o": optOnlyAscii = true
     of "verbose": incl(options, optVerbose)
     of "filenames": incl(options, optFilenames)