Tweak and/or add to apt-cache

sheets/apt-cache

@@ -1,9 +1,12 @@
-# Search for package PKG. Both package names and their descriptions are searched
-# for a REGEX match; to avoid this behavior, you may use the `-n` flag, which will
-# only look for a match in the package name.
+# apt-cache
+# Query the APT cache
+
+# Search for package PKG. Both package names and their descriptions are
+# searched for a REGEX match; to avoid this behavior, you may use the `-n`
+# flag, which will only look for a match in the package name.
 apt-cache search 'PKG'
 
-# Regarding the above, although multiple package names may not be specified, it's
-# possible to use ERE to easily and quickly get around this limitation. Here, all
-# 3 packages (PKG1, PKG2, and PKG3) will be sought.
+# Regarding the above, although multiple package names may not be specified, -
+# it's possible to use ERE to easily and quickly get around this limitation.
+# Here, all 3 packages (PKG1, PKG2, and PKG3) will be sought.
 apt-cache search '(PKG1|PKG2|PKG3)'