Remove unnecessary goal + grammar fixes for other goals

src/main/java/org/openrewrite/maven/AbstractRewriteDryRunMojo.java

@@ -52,8 +52,8 @@ public void execute() throws MojoExecutionException {
             return;
         }
 
-        //If the plugin is configured to run over all projects (at the end of the build) only proceed if the plugin
-        //is being run on the last project.
+        // If the plugin is configured to run over all projects (at the end of the build) only proceed if the plugin
+        // is being run on the last project.
         if (!runPerSubmodule && !project.getId().equals(mavenSession.getProjects().get(mavenSession.getProjects().size() - 1).getId())) {
             return;
         }
@@ -70,22 +70,22 @@ public void execute() throws MojoExecutionException {
         if (results.isNotEmpty()) {
             for (Result result : results.generated) {
                 assert result.getAfter() != null;
-                getLog().warn("These recipes would generate new file " +
+                getLog().warn("These recipes would generate a new file " +
                               result.getAfter().getSourcePath() +
                               ":");
                 logRecipesThatMadeChanges(result);
             }
             for (Result result : results.deleted) {
                 assert result.getBefore() != null;
-                getLog().warn("These recipes would delete file " +
+                getLog().warn("These recipes would delete a file " +
                               result.getBefore().getSourcePath() +
                               ":");
                 logRecipesThatMadeChanges(result);
             }
             for (Result result : results.moved) {
                 assert result.getBefore() != null;
                 assert result.getAfter() != null;
-                getLog().warn("These recipes would move file from " +
+                getLog().warn("These recipes would move a file from " +
                               result.getBefore().getSourcePath() + " to " +
                               result.getAfter().getSourcePath() + ":");
                 logRecipesThatMadeChanges(result);

src/main/java/org/openrewrite/maven/AbstractRewriteRunMojo.java

@@ -43,8 +43,8 @@ public void execute() throws MojoExecutionException {
             return;
         }
 
-        //If the plugin is configured to run over all projects (at the end of the build) only proceed if the plugin
-        //is being run on the last project.
+        // If the plugin is configured to run over all projects (at the end of the build) only proceed if the plugin
+        // is being run on the last project.
         if (!runPerSubmodule && !project.getId().equals(mavenSession.getProjects().get(mavenSession.getProjects().size() - 1).getId())) {
             return;
         }

src/main/java/org/openrewrite/maven/RewriteDiscoverMojo.java

@@ -32,8 +32,9 @@
 import java.util.HashSet;
 
 /**
- * Generate a report of available recipes found on the classpath.<br>
- * {@code ./mvnw rewrite:discover -Ddetail=true -Drecipe=<recipe-name>} to display recipe configuration details. For example:<br>
+ * Generate a report of the available recipes and styles found on the classpath.<br>
+ * <br>
+ * Can also be used to display information about a specific recipe. For example:<br>
  * {@code ./mvnw rewrite:discover -Ddetail=true -Drecipe=org.openrewrite.java.format.AutoFormat}
  */
 @Mojo(name = "discover", threadSafe = true, requiresProject = false, aggregator = true)