Man page fixes

 - Remove unnecessary linefeeds above "ENVIRONMENT"

 - Use the word "example" rather than "sample" to be more consistent
   throughout the documentation

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Library/Contributions/manpages/brew.1.md

@@ -290,12 +290,10 @@ Homebrew allows external commands to be defined by putting a +x file named
 `brew-<cmdname>` or `brew-<cmdname>.rb` on the PATH. This will cause Homebrew
 to recognize `brew cmdname`.
 
-Some sample commands ship with Homebrew and are enabled by default.
+Some example commands ship with Homebrew and are enabled by default.
 
     $ ls `brew --repository`/Library/Contributions/examples
 
-
-
 ## ENVIRONMENT
 
   * HOMEBREW\_BUILD\_FROM\_SOURCE:

share/man/man1/brew.1

@@ -323,7 +323,7 @@ Print the version number of brew to standard error and exit\.
 Homebrew allows external commands to be defined by putting a +x file named \fBbrew\-<cmdname>\fR or \fBbrew\-<cmdname>\.rb\fR on the PATH\. This will cause Homebrew to recognize \fBbrew cmdname\fR\.
 .
 .P
-Some sample commands ship with Homebrew and are enabled by default\.
+Some example commands ship with Homebrew and are enabled by default\.
 .
 .IP "" 4
 .