some text fixes

doc/userguide.md

@@ -20,7 +20,7 @@ and quite popular definition, if not very purist.)
 The Radicle node stores Git repositories and synchronizes them with
 other Radicle nodes. The CI broker connects to its local node and gets
 "node events" whenever anything changes in the node. The relevant
-change for the CI broker is that a Git references ("refs") in a
+change for the CI broker is that Git references ("refs") in a
 repository have been created, updated, or deleted. For now, these are
 branches. Later, Radicle and the CI broker will support other
 references, such as tags.
@@ -30,9 +30,9 @@ deleted. It's not possible to create a Radicle repository without
 creating a branch, so just looking at references is enough.
 
 The CI broker looks at the reference changes and refines them into "CI
-events", which are more suitable for the kind CI use that the CI
-broker is meant to enable, than "this ref changed", which is quite low
-level.
+events", which are more suitable for the kind of CI use that the CI
+broker is meant to enable. That is, it does not care about all
+"this ref changed" events, which are quite low level.
 
 The CI events are filtered, and events that are allowed by the filter
 trigger a CI run, which runs another program called the CI adapter.
@@ -47,7 +47,7 @@ configuration to suit the CI system it targets.
 
 To use Radicle CI, you first need to have a Radicle node where you
 want to run CI. Due to technical limitations, this can't be your usual
-node, because it won't react to changes you push to it, only to
+node, because it won't react to changes you push to it. It will only react to
 changes it receives from other nodes.
 
 Once you've [installed a Radicle node and it is
@@ -149,7 +149,7 @@ Check the report file to see that it works.
   published.
 
 If all works, excellent. If not, and you need help, drop by the
-[Radicle Zulip](https://radicle.zulipchat.com/) chat for ask for help.
+[Radicle Zulip](https://radicle.zulipchat.com/) chat to ask for help.
 
 Next, you probably want to consider what adapter you want to use. See
 the
@@ -204,7 +204,7 @@ triggers:
 ~~~
 
 * Create `~/.config/ambient/config.yaml` (adjust the various fields
-  for how much resource usage want to allow, and paths):
+  for how much resource usage to allow, and paths):
 
 ~~~yaml
 tmpdir: /tmp
@@ -448,7 +448,7 @@ must be one of the operands from the table above. Simple values are
 expressed as doubly quoted strings, and lists of operands are
 sub-lists in YAML syntax.
 
-The `filters` field is a list of filter expressions that implicitly
+The `filters` field is a list of filter expressions that are implicitly
 joined together using '!Or` -- in other words, if any of the
 expressions in the list allows the event, the whole list allows the
 events.