Minor copy edits courtesy of a review by @alvin-huang

content/doc/book/pipeline/index.adoc

@@ -123,10 +123,10 @@ image::/images/pipeline/realworld-pipeline-flow.png[title="Pipeline Flow", 800]
 
 [[step]]
 Step::
-    A single task, fundamentally steps tell Jenkins _what_ to do. For example, in
-    order to instruct Jenkins to execute the shell command `make`, the `sh`
-    step would be used: `sh 'make'`.
-    When a plugin extends to Pipeline DSL, that typically means the plugin has
+    A single task; fundamentally steps tell Jenkins _what_ to do. In
+    order to execute the shell command `make`, the `sh`
+    step would be used. for example `sh 'make'`.
+    When a plugin extends the Pipeline DSL, that typically means the plugin has
     implemented a new _step_.
 
 [[node]]
@@ -148,8 +148,8 @@ for more information.
 
 [[stage]]
 Stage::
-    A "stage" is a step for defining a conceptually distinct subset of the
+    `stage` is a step for defining a conceptually distinct subset of the
     entire Pipeline, for example: "Build", "Test", and "Deploy". While stages
-    no bearing on the execution of the Pipeline, they are used by many plugins
-    which visualize or present Jenkins Pipeline status/progress.
+    have no bearing on the execution of the Pipeline, they are used by many
+    plugins to visualize or present Jenkins Pipeline status/progress.
     footnoteref:[blueocean,link:/projects/blueocean[Blue Ocean], link:https://wiki.jenkins-ci.org/display/JENKINS/Pipeline+Stage+View+Plugin[Pipeline Stage View plugin]]