test-rename: fix \" -> " in comments

tests/test-rename.t

@@ -418,7 +418,7 b' do not copy more than one source file to'
   4 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ rm -rf d3
 
-move a whole subtree with \"hg rename .\"
+move a whole subtree with "hg rename ."
 
   $ mkdir d3
   $ (cd d1; hg rename . ../d3)
@@ -443,7 +443,7 b' move a whole subtree with \\"hg rename .\\'
   4 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ rm -rf d3
 
-move a whole subtree with \"hg rename --after .\"
+move a whole subtree with "hg rename --after ."
 
   $ mkdir d3
   $ mv d1/* d3
@@ -469,7 +469,7 b' move a whole subtree with \\"hg rename --'
   4 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ rm -rf d3
 
-move the parent tree with \"hg rename ..\"
+move the parent tree with "hg rename .."
 
   $ (cd d1/d11; hg rename .. ../../d3)
   moving ../a to ../../d3/a