Merge pull request #1924 from blair/consistly-use-underscores

library/apt: consistently use underscores in examples.

apt

@@ -70,7 +70,7 @@ options:
 author: Matthew Williams
 notes: []
 examples:
-    - code: "apt: pkg=foo update-cache=yes"
+    - code: "apt: pkg=foo update_cache=yes"
       description: Update repositories cache and install C(foo) package
     - code: "apt: pkg=foo state=removed"
       description: Remove C(foo) package
@@ -78,9 +78,9 @@ examples:
       description: Install the package C(foo)
     - code: "apt: pkg=foo=1.00 state=installed"
       description: Install the version '1.00' of package C(foo)
-    - code: "apt: pkg=nginx state=latest default-release=squeeze-backports update-cache=yes"
+    - code: "apt: pkg=nginx state=latest default_release=squeeze-backports update_cache=yes"
       description: Update the repository cache and update package C(ngnix) to latest version using default release C(squeeze-backport)
-    - code: "apt: pkg=openjdk-6-jdk state=latest install-recommends=no"
+    - code: "apt: pkg=openjdk-6-jdk state=latest install_recommends=no"
       description: Install latest version of C(openjdk-6-jdk) ignoring C(install-reccomends)
 '''