Use new #? filter prefix in various places

This silences deprecation warnings and prevent collision with UNIX shebang.

examples/filterex.nim

@@ -1,4 +1,4 @@
-#! stdtmpl | standard
+#? stdtmpl | standard
 #proc generateHTMLPage(title, currentTab, content: string,
 #                      tabs: openArray[string]): string =
 #  result = ""

tests/template/sunset.tmpl

@@ -1,4 +1,4 @@
-#! stdtmpl
+#? stdtmpl
 #proc sunsetTemplate*(current, ticker, content: string,
 #                     tabs: openarray[array[0..1, string]]): string = 
 #  result = ""

tools/niminst/buildbat.tmpl

@@ -1,4 +1,4 @@
-#! stdtmpl(subsChar='?') | standard
+#? stdtmpl(subsChar='?') | standard
 #proc generateBuildBatchScript(c: ConfigData, winIndex, cpuIndex: int): string = 
 #  result = "@echo off\nREM Generated by niminst\n"
 SET CC=gcc

tools/niminst/buildsh.tmpl

@@ -1,4 +1,4 @@
-#! stdtmpl(subsChar='?') | standard
+#? stdtmpl(subsChar='?') | standard
 #proc generateBuildShellScript(c: ConfigData): string = 
 #  result = "#! /bin/sh\n# Generated from niminst\n" &
 #           "# Template is in tools/niminst/buildsh.tmpl\n" &

tools/niminst/deinstall.tmpl

@@ -1,4 +1,4 @@
-#! stdtmpl(subsChar='?') | standard
+#? stdtmpl(subsChar='?') | standard
 #proc generateDeinstallScript(c: ConfigData): string = 
 #  result = "#! /bin/sh\n# Generated by niminst\n"
 #  var proj = c.name.toLower

tools/niminst/inno.tmpl

@@ -1,4 +1,4 @@
-#! stdtmpl | standard
+#? stdtmpl | standard
 #proc generateInnoSetup(c: ConfigData): string =
 #  result = ""
 ; Default Template for NimInst

tools/niminst/install.tmpl

@@ -1,4 +1,4 @@
-#! stdtmpl(subsChar = '?') | standard
+#? stdtmpl(subsChar = '?') | standard
 #proc generateInstallScript(c: ConfigData): string = 
 #  result = "#! /bin/sh\n# Generated by niminst\n"
 #  var proj = c.name.toLower

tools/niminst/makefile.tmpl

@@ -1,4 +1,4 @@
-#! stdtmpl(subsChar='?') | standard
+#? stdtmpl(subsChar='?') | standard
 #proc generateMakefile(c: ConfigData): string = 
 #  result = "# Generated from niminst\n" &
 #           "# Template is in tools/niminst/makefile.tmpl\n" &

tools/niminst/nsis.tmpl

@@ -1,4 +1,4 @@
-#! stdtmpl(subsChar='?') | standard
+#? stdtmpl(subsChar='?') | standard
 #proc generateNsisSetup(c: ConfigData): string =
 #  result = "; NSIS script generated by niminst\n" &
 #           "; To regenerate run ``niminst nsis`` or ``koch nsis``\n"