remove trailing spaces from markdown files (apache#995)

* remove trailing spaces from .github/ISSUE_TEMPLATE.md
* remove trailing spaces from .github/ISSUE_TEMPLATE/BUG_REPORT.md
* remove trailing spaces from .github/ISSUE_TEMPLATE/FEATURE_REQUEST.md
* remove trailing spaces from CONTRIBUTING.md

Author: Chris Brody

.github/ISSUE_TEMPLATE.md

@@ -24,10 +24,10 @@ We very much prefer issues created by using one of these templates.
 
 
 ### Version information
-<!-- 
+<!--
 What are relevant versions you are using?
 For example:
-Cordova: Cordova CLI, Cordova Platforms, Cordova Plugins 
+Cordova: Cordova CLI, Cordova Platforms, Cordova Plugins
 Other Frameworks: Ionic Framework and CLI version
 Operating System, Android Studio, Xcode etc.
 -->

.github/ISSUE_TEMPLATE/BUG_REPORT.md

@@ -32,10 +32,10 @@ about: If something isn't working as expected.
 
 
 ### Version information
-<!-- 
+<!--
 What are relevant versions you are using?
 For example:
-Cordova: Cordova CLI, Cordova Platforms, Cordova Plugins 
+Cordova: Cordova CLI, Cordova Platforms, Cordova Plugins
 Other Frameworks: Ionic Framework and CLI version
 Operating System, Android Studio, Xcode etc.
 -->

.github/ISSUE_TEMPLATE/FEATURE_REQUEST.md

@@ -12,17 +12,17 @@ about: A suggestion for a new functionality
 
 
 ## Feature Description
-<!-- 
+<!--
 Describe your feature request in detail
 Please provide any code examples or screenshots of what this feature would look like
-Are there any drawbacks? Will this break anything for existing users? 
+Are there any drawbacks? Will this break anything for existing users?
 -->
 
 
 
 ## Alternatives or Workarounds
-<!-- 
-Describe alternatives or workarounds you are currently using 
+<!--
+Describe alternatives or workarounds you are currently using
 Are there ways to do this with existing functionality?
 -->
 

CONTRIBUTING.md

@@ -25,7 +25,7 @@ Anyone can contribute to Cordova. And we need your contributions.
 
 There are multiple ways to contribute: report bugs, improve the docs, and
 contribute code.
-  
+
 For instructions on this, start with the
 [contribution overview](http://cordova.apache.org/contribute/).