reorder ALLOW_TEXTCONV option setting

Right now for the diff porcelain and the log family, we
call:

  init_revisions();
  setup_revisions();
  DIFF_OPT_SET(ALLOW_TEXTCONV);

However, that means textconv will _always_ be on, instead of
being a default that can be manipulated with
setup_revisions. Instead, we want:

  init_revisions();
  DIFF_OPT_SET(ALLOW_TEXTCONV);
  setup_revisions();

which is what this patch does.

We'll go ahead and move the callsite in wt-status, also;
even though the user can't pass any options here, it is a
cleanup that will help avoid any surprise later if the
setup_revisions line is changed.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin-diff.c b/builtin-diff.c
index dddcf69..d75d69b 100644
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -290,8 +290,9 @@
 	/* Otherwise, we are doing the usual "git" diff */
 	rev.diffopt.skip_stat_unmatch = !!diff_auto_refresh_index;
 
-	/* Default to let external be used */
+	/* Default to let external and textconv be used */
 	DIFF_OPT_SET(&rev.diffopt, ALLOW_EXTERNAL);
+	DIFF_OPT_SET(&rev.diffopt, ALLOW_TEXTCONV);
 
 	if (nongit)
 		die("Not a git repository");
@@ -303,7 +304,6 @@
 	}
 
 	DIFF_OPT_SET(&rev.diffopt, RECURSIVE);
-	DIFF_OPT_SET(&rev.diffopt, ALLOW_TEXTCONV);
 
 	/*
 	 * If the user asked for our exit code then don't start a
diff --git a/builtin-log.c b/builtin-log.c
index b164717..840daf9 100644
--- a/builtin-log.c
+++ b/builtin-log.c
@@ -37,6 +37,7 @@
 	DIFF_OPT_SET(&rev->diffopt, RECURSIVE);
 	rev->show_root_diff = default_show_root;
 	rev->subject_prefix = fmt_patch_subject_prefix;
+	DIFF_OPT_SET(&rev->diffopt, ALLOW_TEXTCONV);
 
 	if (default_date_mode)
 		rev->date_mode = parse_date_format(default_date_mode);
@@ -60,7 +61,6 @@
 		} else
 			die("unrecognized argument: %s", arg);
 	}
-	DIFF_OPT_SET(&rev->diffopt, ALLOW_TEXTCONV);
 }
 
 /*
diff --git a/wt-status.c b/wt-status.c
index 3edae43..96ff2f8 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -279,11 +279,11 @@
 	struct rev_info rev;
 
 	init_revisions(&rev, NULL);
+	DIFF_OPT_SET(&rev.diffopt, ALLOW_TEXTCONV);
 	setup_revisions(0, NULL, &rev,
 		s->is_initial ? EMPTY_TREE_SHA1_HEX : s->reference);
 	rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
 	rev.diffopt.detect_rename = 1;
-	DIFF_OPT_SET(&rev.diffopt, ALLOW_TEXTCONV);
 	rev.diffopt.file = s->fp;
 	rev.diffopt.close_file = 0;
 	/*