diff --git a/doc/sample_html/d_7b071bdc2a35fa80___init___py.html b/doc/sample_html/d_7b071bdc2a35fa80___init___py.html
index 18bdc7adb..7d2c3e89e 100644
--- a/doc/sample_html/d_7b071bdc2a35fa80___init___py.html
+++ b/doc/sample_html/d_7b071bdc2a35fa80___init___py.html
@@ -66,8 +66,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80___main___py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
         <aside class="hidden">
             <button type="button" class="button_next_chunk" data-shortcut="j"/>
@@ -99,8 +99,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80___main___py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
     </div>
 </footer>
diff --git a/doc/sample_html/d_7b071bdc2a35fa80___main___py.html b/doc/sample_html/d_7b071bdc2a35fa80___main___py.html
index 5de5b8ae8..d5bc36c7f 100644
--- a/doc/sample_html/d_7b071bdc2a35fa80___main___py.html
+++ b/doc/sample_html/d_7b071bdc2a35fa80___main___py.html
@@ -66,8 +66,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_backward_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
         <aside class="hidden">
             <button type="button" class="button_next_chunk" data-shortcut="j"/>
@@ -95,8 +95,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_backward_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
     </div>
 </footer>
diff --git a/doc/sample_html/d_7b071bdc2a35fa80_backward_py.html b/doc/sample_html/d_7b071bdc2a35fa80_backward_py.html
index 6809a15d7..e0f2f0a03 100644
--- a/doc/sample_html/d_7b071bdc2a35fa80_backward_py.html
+++ b/doc/sample_html/d_7b071bdc2a35fa80_backward_py.html
@@ -66,8 +66,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_cogapp_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
         <aside class="hidden">
             <button type="button" class="button_next_chunk" data-shortcut="j"/>
@@ -132,8 +132,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_cogapp_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
     </div>
 </footer>
diff --git a/doc/sample_html/d_7b071bdc2a35fa80_cogapp_py.html b/doc/sample_html/d_7b071bdc2a35fa80_cogapp_py.html
index a89c0d333..428edad9b 100644
--- a/doc/sample_html/d_7b071bdc2a35fa80_cogapp_py.html
+++ b/doc/sample_html/d_7b071bdc2a35fa80_cogapp_py.html
@@ -66,8 +66,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_makefiles_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
         <aside class="hidden">
             <button type="button" class="button_next_chunk" data-shortcut="j"/>
@@ -935,8 +935,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_makefiles_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
     </div>
 </footer>
diff --git a/doc/sample_html/d_7b071bdc2a35fa80_makefiles_py.html b/doc/sample_html/d_7b071bdc2a35fa80_makefiles_py.html
index a0df838f4..9ceb57e9f 100644
--- a/doc/sample_html/d_7b071bdc2a35fa80_makefiles_py.html
+++ b/doc/sample_html/d_7b071bdc2a35fa80_makefiles_py.html
@@ -66,8 +66,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_test_cogapp_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
         <aside class="hidden">
             <button type="button" class="button_next_chunk" data-shortcut="j"/>
@@ -136,8 +136,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_test_cogapp_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
     </div>
 </footer>
diff --git a/doc/sample_html/d_7b071bdc2a35fa80_test_cogapp_py.html b/doc/sample_html/d_7b071bdc2a35fa80_test_cogapp_py.html
index 20bc0b096..d925934f3 100644
--- a/doc/sample_html/d_7b071bdc2a35fa80_test_cogapp_py.html
+++ b/doc/sample_html/d_7b071bdc2a35fa80_test_cogapp_py.html
@@ -66,8 +66,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_test_makefiles_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
         <aside class="hidden">
             <button type="button" class="button_next_chunk" data-shortcut="j"/>
@@ -2723,8 +2723,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_test_makefiles_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
     </div>
 </footer>
diff --git a/doc/sample_html/d_7b071bdc2a35fa80_test_makefiles_py.html b/doc/sample_html/d_7b071bdc2a35fa80_test_makefiles_py.html
index ed2c0c42c..daa0f0eb0 100644
--- a/doc/sample_html/d_7b071bdc2a35fa80_test_makefiles_py.html
+++ b/doc/sample_html/d_7b071bdc2a35fa80_test_makefiles_py.html
@@ -66,8 +66,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_test_whiteutils_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
         <aside class="hidden">
             <button type="button" class="button_next_chunk" data-shortcut="j"/>
@@ -212,8 +212,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_test_whiteutils_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
     </div>
 </footer>
diff --git a/doc/sample_html/d_7b071bdc2a35fa80_test_whiteutils_py.html b/doc/sample_html/d_7b071bdc2a35fa80_test_whiteutils_py.html
index 3f9c115e1..8d0118cc0 100644
--- a/doc/sample_html/d_7b071bdc2a35fa80_test_whiteutils_py.html
+++ b/doc/sample_html/d_7b071bdc2a35fa80_test_whiteutils_py.html
@@ -66,8 +66,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_whiteutils_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
         <aside class="hidden">
             <button type="button" class="button_next_chunk" data-shortcut="j"/>
@@ -191,8 +191,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="d_7b071bdc2a35fa80_whiteutils_py.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
     </div>
 </footer>
diff --git a/doc/sample_html/d_7b071bdc2a35fa80_whiteutils_py.html b/doc/sample_html/d_7b071bdc2a35fa80_whiteutils_py.html
index 4d65fa5ff..2bcc3c0aa 100644
--- a/doc/sample_html/d_7b071bdc2a35fa80_whiteutils_py.html
+++ b/doc/sample_html/d_7b071bdc2a35fa80_whiteutils_py.html
@@ -66,8 +66,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="index.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
         <aside class="hidden">
             <button type="button" class="button_next_chunk" data-shortcut="j"/>
@@ -163,8 +163,8 @@ <h2>
             <a id="indexLink" class="nav" href="index.html">&Hat; index</a> &nbsp; &nbsp;
             <a id="nextFileLink" class="nav" href="index.html">&#xbb; next</a>
             &nbsp; &nbsp; &nbsp;
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
     </div>
 </footer>
diff --git a/doc/sample_html/index.html b/doc/sample_html/index.html
index c82ac171d..5c735a4f2 100644
--- a/doc/sample_html/index.html
+++ b/doc/sample_html/index.html
@@ -46,8 +46,8 @@ <h1>Cog coverage:
             <input id="filter" type="text" value="" placeholder="filter..." />
         </form>
         <p class="text">
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
     </div>
 </header>
@@ -166,8 +166,8 @@ <h1>Cog coverage:
 <footer>
     <div class="content">
         <p>
-            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.0.5</a>,
-            created at 2023-01-10 18:17 -0500
+            <a class="nav" href="https://coverage.readthedocs.io">coverage.py v7.1.0</a>,
+            created at 2023-01-24 19:37 -0500
         </p>
     </div>
     <aside class="hidden">
diff --git a/doc/sample_html/status.json b/doc/sample_html/status.json
index c794270e0..f44f9af0b 100644
--- a/doc/sample_html/status.json
+++ b/doc/sample_html/status.json
@@ -1 +1 @@
-{"format":2,"version":"7.0.5","globals":"436e227e3fe8ed82b20a49aa3b772003","files":{"d_7b071bdc2a35fa80___init___py":{"hash":"29cdbd59f3692c82f37e41536e3a2417","index":{"nums":[2,1,2,0,0,0,0,0],"html_filename":"d_7b071bdc2a35fa80___init___py.html","relative_filename":"cogapp/__init__.py"}},"d_7b071bdc2a35fa80___main___py":{"hash":"ffe6befa655d4d0b0b31eb0c73811311","index":{"nums":[2,1,3,0,3,0,0,0],"html_filename":"d_7b071bdc2a35fa80___main___py.html","relative_filename":"cogapp/__main__.py"}},"d_7b071bdc2a35fa80_backward_py":{"hash":"8f127f1e99243534806b5e7842d7bd7c","index":{"nums":[2,1,22,0,6,4,2,2],"html_filename":"d_7b071bdc2a35fa80_backward_py.html","relative_filename":"cogapp/backward.py"}},"d_7b071bdc2a35fa80_cogapp_py":{"hash":"659112bebf3e453082a54c29ddc9be18","index":{"nums":[2,1,510,1,230,216,30,144],"html_filename":"d_7b071bdc2a35fa80_cogapp_py.html","relative_filename":"cogapp/cogapp.py"}},"d_7b071bdc2a35fa80_makefiles_py":{"hash":"4cac5bcd4b2151cb0f865736ff610acc","index":{"nums":[2,1,27,0,20,14,0,14],"html_filename":"d_7b071bdc2a35fa80_makefiles_py.html","relative_filename":"cogapp/makefiles.py"}},"d_7b071bdc2a35fa80_test_cogapp_py":{"hash":"dab21c99d2584fd9dd1245ae7eb199cd","index":{"nums":[2,1,849,2,595,28,1,25],"html_filename":"d_7b071bdc2a35fa80_test_cogapp_py.html","relative_filename":"cogapp/test_cogapp.py"}},"d_7b071bdc2a35fa80_test_makefiles_py":{"hash":"150060801c7a23f407563647d09899ff","index":{"nums":[2,1,71,0,53,6,0,6],"html_filename":"d_7b071bdc2a35fa80_test_makefiles_py.html","relative_filename":"cogapp/test_makefiles.py"}},"d_7b071bdc2a35fa80_test_whiteutils_py":{"hash":"6c4e351912582b16a450ab46df5d390c","index":{"nums":[2,1,69,0,50,0,0,0],"html_filename":"d_7b071bdc2a35fa80_test_whiteutils_py.html","relative_filename":"cogapp/test_whiteutils.py"}},"d_7b071bdc2a35fa80_whiteutils_py":{"hash":"755965ecdf5d51b6b9350f179070494f","index":{"nums":[2,1,45,0,5,34,4,4],"html_filename":"d_7b071bdc2a35fa80_whiteutils_py.html","relative_filename":"cogapp/whiteutils.py"}}}}
\ No newline at end of file
+{"format":2,"version":"7.1.0","globals":"7055224a7bc2d5650caf977ebd61f5fe","files":{"d_7b071bdc2a35fa80___init___py":{"hash":"29cdbd59f3692c82f37e41536e3a2417","index":{"nums":[2,1,2,0,0,0,0,0],"html_filename":"d_7b071bdc2a35fa80___init___py.html","relative_filename":"cogapp/__init__.py"}},"d_7b071bdc2a35fa80___main___py":{"hash":"ffe6befa655d4d0b0b31eb0c73811311","index":{"nums":[2,1,3,0,3,0,0,0],"html_filename":"d_7b071bdc2a35fa80___main___py.html","relative_filename":"cogapp/__main__.py"}},"d_7b071bdc2a35fa80_backward_py":{"hash":"8f127f1e99243534806b5e7842d7bd7c","index":{"nums":[2,1,22,0,6,4,2,2],"html_filename":"d_7b071bdc2a35fa80_backward_py.html","relative_filename":"cogapp/backward.py"}},"d_7b071bdc2a35fa80_cogapp_py":{"hash":"659112bebf3e453082a54c29ddc9be18","index":{"nums":[2,1,510,1,230,216,30,144],"html_filename":"d_7b071bdc2a35fa80_cogapp_py.html","relative_filename":"cogapp/cogapp.py"}},"d_7b071bdc2a35fa80_makefiles_py":{"hash":"4cac5bcd4b2151cb0f865736ff610acc","index":{"nums":[2,1,27,0,20,14,0,14],"html_filename":"d_7b071bdc2a35fa80_makefiles_py.html","relative_filename":"cogapp/makefiles.py"}},"d_7b071bdc2a35fa80_test_cogapp_py":{"hash":"dab21c99d2584fd9dd1245ae7eb199cd","index":{"nums":[2,1,849,2,595,28,1,25],"html_filename":"d_7b071bdc2a35fa80_test_cogapp_py.html","relative_filename":"cogapp/test_cogapp.py"}},"d_7b071bdc2a35fa80_test_makefiles_py":{"hash":"150060801c7a23f407563647d09899ff","index":{"nums":[2,1,71,0,53,6,0,6],"html_filename":"d_7b071bdc2a35fa80_test_makefiles_py.html","relative_filename":"cogapp/test_makefiles.py"}},"d_7b071bdc2a35fa80_test_whiteutils_py":{"hash":"6c4e351912582b16a450ab46df5d390c","index":{"nums":[2,1,69,0,50,0,0,0],"html_filename":"d_7b071bdc2a35fa80_test_whiteutils_py.html","relative_filename":"cogapp/test_whiteutils.py"}},"d_7b071bdc2a35fa80_whiteutils_py":{"hash":"755965ecdf5d51b6b9350f179070494f","index":{"nums":[2,1,45,0,5,34,4,4],"html_filename":"d_7b071bdc2a35fa80_whiteutils_py.html","relative_filename":"cogapp/whiteutils.py"}}}}
\ No newline at end of file