use 'file' with '--mime' option - output is more stable

vim.spec

@@ -21,7 +21,7 @@ Summary: The VIM editor
 URL:     http://www.vim.org/
 Name: vim
 Version: %{baseversion}.%{patchlevel}
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: Vim and MIT
 Source0: ftp://ftp.vim.org/pub/vim/unix/vim-%{baseversion}-%{patchlevel}.tar.bz2
 Source1: vim.sh
@@ -539,7 +539,7 @@ rm -rf %{buildroot}/%{_datadir}/vim/%{vimdir}/doc/vim2html.pl
 rm -f %{buildroot}/%{_datadir}/vim/%{vimdir}/tutor/tutor.gr.utf-8~
 ( cd %{buildroot}/%{_mandir}
   for i in `find ??/ -type f`; do
-    if [[ "`file $i`" == *UTF-8\ Unicode\ text* ]]; then
+    if [[ "`file --mime $i`" == *charset=utf-8* ]]; then
       continue
     fi
     bi=`basename $i`
@@ -788,6 +788,9 @@ touch %{buildroot}/%{_datadir}/%{name}/vimfiles/doc/tags
 %{_datadir}/icons/locolor/*/apps/*
 
 %changelog
+* Mon Aug 26 2019 Zdenek Dohnal <zdohnal@redhat.com> - 2:8.1.1912-2
+- use 'file' with '--mime' option - output is more stable
+
 * Fri Aug 23 2019 Zdenek Dohnal <zdohnal@redhat.com> - 2:8.1.1912-1
 - patchlevel 1912