utz>=0.13, bmdf>=0.4, comm-x doc tweaks

README.md

@@ -79,15 +79,16 @@ echo '{"a":1,"b":3}' | jq > 2.json
 ```
 
 ### `comm-x` <a id="comm-x"></a>
+`comm` essentially performs set intersection/difference; `comm-x` allows you to run a pipeline of commands on each input, before comparing them.
 
 #### Usage <a id="comm-x-usage"></a>
 <!-- `bmdf comm-x` -->
 ```bash
 comm-x
 # Usage: comm-x [OPTIONS] [exec_cmd...] <path1> <path2>
 #
-#   Compare (`comm`) two files after running them through a pipeline of other
-#   commands.
+#   Select or reject lines common to two input streams, after running each
+#   through a pipeline of other commands.
 #
 # Options:
 #   -1, --exclude-1              Exclude lines only found in the first pipeline

qmdx/comm_x/__init__.py

@@ -30,7 +30,7 @@ def main(
     exec_cmds: Tuple[str, ...],
     args: Tuple[str, ...],
 ):
-    """Compare (`comm`) two files after running them through a pipeline of other commands."""
+    """Select or reject lines common to two input streams, after running each through a pipeline of other commands."""
     if len(args) < 2:
         raise ValueError('Must provide at least two files to comm')
 

requirements-ci.txt

@@ -1 +1 @@
-bmdf>=0.3.6
+bmdf>=0.4.0

requirements.txt

@@ -1,2 +1,2 @@
 click
-utz>=0.12.2
+utz>=0.13.0