Reflected grammatical fixes in commit e5af2b5

Author: sam7wx

man/gist.1.html

@@ -31,7 +31,7 @@ These options can be used to change this behavior:
     Create a private gist instead of a public gist.
 
   * `-t`, `--type`:
-    Set the file extension explicitly. Passing a type of `rb` ensure
+    Set the file extension explicitly. Passing a type of `rb` ensures
     the gist is created as a Ruby file.
 
   * `-o`, `--[no-]open`:
@@ -50,7 +50,7 @@ You may additionally ask for help:
 
 There are two ways to set GitHub user and token info:
 
-  * Using env vars GITHUB_USER and GITHUB_TOKEN
+  * Using environment vars GITHUB_USER and GITHUB_TOKEN
 
     $ export GITHUB_USER=johndoe  
     $ export GITHUB_TOKEN=mysecretgithubtoken