Simplify branch printing aliases#

The branch printing aliases "b" and the extended aliases "bum" and "bm"
have been simplified by removing unnecessary flags.

* The "--list" flag should be used to list branches matching a specific pattern
* The "-v"/"-vv"/"--verbose" flags which shows the commit SHA1 and subject
  line after each branch has been removed

GH-25

snowblocks/git/gitconfig

@@ -331,25 +331,21 @@
   #
   # Usage:
   #   git b
-  # Output Format:
-  #   <BRANCH> <ABBREVIATED SHA1> <COMMIT MESSAGE>
-  b = branch --list --all -v
+  b = branch --all
 
   # Prints only branches that have not been merged yet into the specified branch.
+  # If no BRANCH is specified, the current branch is used by default.
   #
   # Usage:
-  #   git bum <BRANCH>
-  # Output Format:
-  #   <BRANCH> <ABBREVIATED SHA1> <COMMIT MESSAGE>
-  bum = branch --all --list --verbose --no-merged 
+  #   git bum [BRANCH]
+  bum = branch --all --no-merged 
 
   # Prints only branches that have been merged into the specified branch.
+  # If no BRANCH is specified, the current branch is used by default.
   #
   # Usage:
-  #   git bm <BRANCH>
-  # Output Format:
-  # <BRANCH> <ABBREVIATED SHA1> <COMMIT MESSAGE>
-  bm = branch --all --list --verbose --merged
+  #   git bm [BRANCH]
+  bm = branch --all --merged
 
   # +-------------------+
   # + Information - Log +