Core: Add trimWhitespace to getInput (#802)

* Add option to not trim whitespace from inputs

* Fix typos

* Add doc clarification

* Rename options

src/core.ts

@@ -11,6 +11,9 @@ import * as path from 'path'
 export interface InputOptions {
   /** Optional. Whether the input is required. If required and not present, will throw. Defaults to false */
   required?: boolean
+
+  /** Optional. Whether leading/trailing whitespace will be trimmed for the input. Defaults to true */
+  trimWhitespace?: boolean
 }
 
 /**
@@ -88,6 +91,10 @@ export function getInput(name: string, options?: InputOptions): string {
     throw new Error(`Input required and not supplied: ${name}`)
   }
 
+  if (options && options.trimWhitespace === false) {
+    return val
+  }
+
   return val.trim()
 }