tests: glog with style and file parameter (issue1896)

tests/test-glog

@@ -165,6 +165,9 b' echo more >two'
 hg commit -mmore
 hg glog two
 
+echo "% file log with explicit style (issue 1896)"
+hg glog --style=default one
+
 echo % incoming and outgoing
 cd ..
 hg clone -U -r31 repo repo2

tests/test-glog.out

@@ -575,6 +575,12 b' o changeset: 1:5ac72c0599bf'
    date:        Thu Jan 01 00:00:00 1970 +0000
    summary:     two
 
+% file log with explicit style (issue 1896)
+o  changeset:   0:3d578b4a1f53
+   user:        test
+   date:        Thu Jan 01 00:00:00 1970 +0000
+   summary:     one
+
 % incoming and outgoing
 requesting all changes
 adding changesets