diff --git a/NEWS.md b/NEWS.md
index e02db95..72f9982 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -5,7 +5,7 @@
 
 # rotor 0.2.3
 
-* Changed default behaviour of `rotate_date()`, `rotate_time()`, etc...: If
+* Changed default behavior of `rotate_date()`, `rotate_time()`, etc...: If
   no backups exist of target file, use the "created" timestamp 
   to determine whether rotation should take place or not. 
 * `verbose == TRUE` now also displays information on why rotation was NOT 
diff --git a/cran-comments.md b/cran-comments.md
index b22005f..ad11eec 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -1,8 +1,7 @@
 ## Test environments
-* local windows 7 install, R 3.4.2
-* local ubuntu 14.04 install, R 3.6.0
-* ubuntu 14.04 (on travis-ci), R 3.5.3
-* win-builder (devel and release)
+* ubuntu 14.04 (via RStudio Server), R 3.6.1
+* ubuntu 16.04 (via travis), R 3.6.1
+* win-builder (devel)
 * rhub::check_for_cran()
 
 ## R CMD check results
diff --git a/docs/news/index.html b/docs/news/index.html
index 0f4302a..c47a1ea 100644
--- a/docs/news/index.html
+++ b/docs/news/index.html
@@ -118,7 +118,7 @@ <h1 class="page-header">
 <a href="#rotor-0-2-3" class="anchor"></a>rotor 0.2.3<small> 2019-06-17 </small>
 </h1>
 <ul>
-<li>Changed default behaviour of <code><a href="../reference/rotate.html">rotate_date()</a></code>, <code><a href="../reference/rotate.html">rotate_time()</a></code>, etc…: If no backups exist of target file, use the “created” timestamp to determine whether rotation should take place or not.</li>
+<li>Changed default behavior of <code><a href="../reference/rotate.html">rotate_date()</a></code>, <code><a href="../reference/rotate.html">rotate_time()</a></code>, etc…: If no backups exist of target file, use the “created” timestamp to determine whether rotation should take place or not.</li>
 <li>
 <code>verbose == TRUE</code> now also displays information on why rotation was NOT triggered.</li>
 <li>added <code><a href="../reference/backup_info.html">backup_info()</a></code> which is similar to <code><a href="https://rdrr.io/r/base/file.info.html">file.info()</a></code> but with additional backup related infos.</li>
diff --git a/docs/reference/backup_info.html b/docs/reference/backup_info.html
index e94db2a..b96a956 100644
--- a/docs/reference/backup_info.html
+++ b/docs/reference/backup_info.html
@@ -180,15 +180,15 @@ <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examp
 <span class='fu'><a href='rotate.html'>backup</a></span>(<span class='no'>tf</span>)
 
 <span class='fu'>backup_info</span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt;                                     path             name sfx ext size isdir
-#&gt; 1 /tmp/RtmpKoS58Y/test42cc4c2b7d05.1.rds test42cc4c2b7d05   1 rds  289 FALSE
-#&gt; 2 /tmp/RtmpKoS58Y/test42cc4c2b7d05.2.rds test42cc4c2b7d05   2 rds  289 FALSE
+#&gt; 1 /tmp/RtmpFDrb0U/test215e1a2996e7.1.rds test215e1a2996e7   1 rds  289 FALSE
+#&gt; 2 /tmp/RtmpFDrb0U/test215e1a2996e7.2.rds test215e1a2996e7   2 rds  289 FALSE
 #&gt;   mode               mtime               ctime               atime  uid  gid
-#&gt; 1  664 2020-01-02 10:06:14 2020-01-02 10:06:14 2020-01-02 10:06:14 1032 1032
-#&gt; 2  664 2020-01-02 10:06:14 2020-01-02 10:06:14 2020-01-02 10:06:14 1032 1032
+#&gt; 1  664 2020-01-07 09:38:05 2020-01-07 09:38:05 2020-01-07 09:38:05 1000 1000
+#&gt; 2  664 2020-01-07 09:38:05 2020-01-07 09:38:05 2020-01-07 09:38:05 1000 1000
 #&gt;   uname grname index
-#&gt; 1 fleck  fleck     1
-#&gt; 2 fleck  fleck     2</div><div class='input'><span class='fu'>list_backups</span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpKoS58Y/test42cc4c2b7d05.1.rds"
-#&gt; [2] "/tmp/RtmpKoS58Y/test42cc4c2b7d05.2.rds"</div><div class='input'><span class='fu'>n_backups</span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] 2</div><div class='input'><span class='fu'>newest_backup</span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpKoS58Y/test42cc4c2b7d05.1.rds"</div><div class='input'><span class='fu'>oldest_backup</span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpKoS58Y/test42cc4c2b7d05.2.rds"</div><div class='input'>
+#&gt; 1 hoelk  hoelk     1
+#&gt; 2 hoelk  hoelk     2</div><div class='input'><span class='fu'>list_backups</span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpFDrb0U/test215e1a2996e7.1.rds"
+#&gt; [2] "/tmp/RtmpFDrb0U/test215e1a2996e7.2.rds"</div><div class='input'><span class='fu'>n_backups</span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] 2</div><div class='input'><span class='fu'>newest_backup</span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpFDrb0U/test215e1a2996e7.1.rds"</div><div class='input'><span class='fu'>oldest_backup</span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpFDrb0U/test215e1a2996e7.2.rds"</div><div class='input'>
 <span class='co'># cleanup</span>
 <span class='fu'><a href='rotate.html'>prune_backups</a></span>(<span class='no'>tf</span>, <span class='fl'>0</span>)
 <span class='fu'>n_backups</span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] 0</div><div class='input'><span class='fu'><a href='https://rdrr.io/r/base/files.html'>file.remove</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] TRUE</div></pre>
diff --git a/docs/reference/rotate.html b/docs/reference/rotate.html
index 457e0ca..117f258 100644
--- a/docs/reference/rotate.html
+++ b/docs/reference/rotate.html
@@ -365,25 +365,25 @@ <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examp
 <span class='co'># create two backups of `tf``</span>
 <span class='fu'>backup</span>(<span class='no'>tf</span>)
 <span class='fu'>backup</span>(<span class='no'>tf</span>)
-<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)  <span class='co'># find all backups of a file</span></div><div class='output co'>#&gt; [1] "/tmp/RtmpKoS58Y/test42cc12272ec6.1.rds"
-#&gt; [2] "/tmp/RtmpKoS58Y/test42cc12272ec6.2.rds"</div><div class='input'>
+<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)  <span class='co'># find all backups of a file</span></div><div class='output co'>#&gt; [1] "/tmp/RtmpFDrb0U/test215e4a7bc638.1.rds"
+#&gt; [2] "/tmp/RtmpFDrb0U/test215e4a7bc638.2.rds"</div><div class='input'>
 <span class='co'># If `size` is set, a backup is only created if the target file is at least</span>
 <span class='co'># that big. This is more useful for log rotation than for backups.</span>
 <span class='fu'>backup</span>(<span class='no'>tf</span>, <span class='kw'>size</span> <span class='kw'>=</span> <span class='st'>"100 mb"</span>)  <span class='co'># no backup becuase `tf` is to small</span>
-<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpKoS58Y/test42cc12272ec6.1.rds"
-#&gt; [2] "/tmp/RtmpKoS58Y/test42cc12272ec6.2.rds"</div><div class='input'>
+<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpFDrb0U/test215e4a7bc638.1.rds"
+#&gt; [2] "/tmp/RtmpFDrb0U/test215e4a7bc638.2.rds"</div><div class='input'>
 <span class='co'># If `dry_run` is TRUE, backup() only shows what would happen without</span>
 <span class='co'># actually creating or deleting files</span>
-<span class='fu'>backup</span>(<span class='no'>tf</span>, <span class='kw'>size</span> <span class='kw'>=</span> <span class='st'>"0.1kb"</span>, <span class='kw'>dry_run</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)</div><div class='output co'>#&gt; <span class='message'>[dry_run] renaming:</span></div><div class='output co'>#&gt; <span class='message'>[dry_run] ~ /tmp/RtmpKoS58Y/test42cc12272ec6.2.rds -&gt; test42cc12272ec6.3.rds</span>
-#&gt; <span class='message'>[dry_run] ~ /tmp/RtmpKoS58Y/test42cc12272ec6.1.rds -&gt; test42cc12272ec6.2.rds</span></div><div class='output co'>#&gt; <span class='message'>[dry_run] copying:</span></div><div class='output co'>#&gt; <span class='message'>[dry_run] + /tmp/RtmpKoS58Y/test42cc12272ec6.rds -&gt; test42cc12272ec6.1.rds</span></div><div class='input'>
+<span class='fu'>backup</span>(<span class='no'>tf</span>, <span class='kw'>size</span> <span class='kw'>=</span> <span class='st'>"0.1kb"</span>, <span class='kw'>dry_run</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)</div><div class='output co'>#&gt; <span class='message'>[dry_run] renaming:</span></div><div class='output co'>#&gt; <span class='message'>[dry_run] ~ /tmp/RtmpFDrb0U/test215e4a7bc638.2.rds -&gt; test215e4a7bc638.3.rds</span>
+#&gt; <span class='message'>[dry_run] ~ /tmp/RtmpFDrb0U/test215e4a7bc638.1.rds -&gt; test215e4a7bc638.2.rds</span></div><div class='output co'>#&gt; <span class='message'>[dry_run] copying:</span></div><div class='output co'>#&gt; <span class='message'>[dry_run] + /tmp/RtmpFDrb0U/test215e4a7bc638.rds -&gt; test215e4a7bc638.1.rds</span></div><div class='input'>
 <span class='co'># rotate() is the same as backup(), but replaces `tf`` with an empty file</span>
 <span class='fu'>rotate</span>(<span class='no'>tf</span>)
-<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpKoS58Y/test42cc12272ec6.1.rds"
-#&gt; [2] "/tmp/RtmpKoS58Y/test42cc12272ec6.2.rds"
-#&gt; [3] "/tmp/RtmpKoS58Y/test42cc12272ec6.3.rds"</div><div class='input'><span class='fu'><a href='https://rdrr.io/r/base/file.info.html'>file.size</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] 0</div><div class='input'><span class='fu'><a href='https://rdrr.io/r/base/file.info.html'>file.size</a></span>(<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>))</div><div class='output co'>#&gt; [1] 289 289 289</div><div class='input'>
+<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpFDrb0U/test215e4a7bc638.1.rds"
+#&gt; [2] "/tmp/RtmpFDrb0U/test215e4a7bc638.2.rds"
+#&gt; [3] "/tmp/RtmpFDrb0U/test215e4a7bc638.3.rds"</div><div class='input'><span class='fu'><a href='https://rdrr.io/r/base/file.info.html'>file.size</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] 0</div><div class='input'><span class='fu'><a href='https://rdrr.io/r/base/file.info.html'>file.size</a></span>(<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>))</div><div class='output co'>#&gt; [1] 289 289 289</div><div class='input'>
 <span class='co'># prune_backups() can remove old backups</span>
 <span class='fu'>prune_backups</span>(<span class='no'>tf</span>, <span class='fl'>1</span>)  <span class='co'># keep only one backup</span>
-<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpKoS58Y/test42cc12272ec6.1.rds"</div><div class='input'>
+<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpFDrb0U/test215e4a7bc638.1.rds"</div><div class='input'>
 <span class='co'># rotate/backup_date() adds a date instead of an index</span>
 <span class='co'># you should not mix index backups and timestamp backups</span>
 <span class='co'># so we clean up first</span>
@@ -400,12 +400,12 @@ <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examp
 
 <span class='co'># `now` overrides the current date.</span>
 <span class='fu'>backup_date</span>(<span class='no'>tf</span>, <span class='kw'>age</span> <span class='kw'>=</span> <span class='st'>"1 year"</span>, <span class='kw'>now</span> <span class='kw'>=</span> <span class='st'>"2999-12-31"</span>)
-<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpKoS58Y/test42cc12272ec6.2999-12-31.rds"</div><div class='input'>
+<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpFDrb0U/test215e4a7bc638.2999-12-31.rds"</div><div class='input'>
 <span class='co'># backup_time() creates backups with a full timestamp</span>
 <span class='fu'>backup_time</span>(<span class='no'>tf</span>)
 
 <span class='co'># It's okay to mix backup_date() and backup_time()</span>
-<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpKoS58Y/test42cc12272ec6.2999-12-31.rds"</div><div class='input'>
+<span class='fu'><a href='backup_info.html'>list_backups</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] "/tmp/RtmpFDrb0U/test215e4a7bc638.2999-12-31.rds"</div><div class='input'>
 <span class='co'># cleanup</span>
 <span class='fu'>prune_backups</span>(<span class='no'>tf</span>, <span class='fl'>0</span>)
 <span class='fu'><a href='https://rdrr.io/r/base/files.html'>file.remove</a></span>(<span class='no'>tf</span>)</div><div class='output co'>#&gt; [1] TRUE</div></pre>