Fix a typo (#679)

Author: ExplodingCabbage

README.md

@@ -186,7 +186,7 @@ jsdiff's diff functions all take an old text and a new text and perform three st
 
 * `parsePatch(diffStr)` - Parses a patch into structured data
 
-    Return a JSON object representation of the a patch, suitable for use with the `applyPatch` method. This parses to the same structure returned by `structuredPatch`.
+    Return a JSON object representation of the patch, suitable for use with the `applyPatch` method. This parses to the same structure returned by `structuredPatch`.
 
 * `reversePatch(patch)` - Returns a new structured patch which when applied will undo the original `patch`.
 

src/patch/parse.ts

@@ -3,7 +3,7 @@ import type { StructuredPatch } from '../types.js';
 /**
  * Parses a patch into structured data, in the same structure returned by `structuredPatch`.
  *
- * @return a JSON object representation of the a patch, suitable for use with the `applyPatch` method.
+ * @return a JSON object representation of the patch, suitable for use with the `applyPatch` method.
  */
 export function parsePatch(uniDiff: string): StructuredPatch[] {
   const diffstr = uniDiff.split(/\n/),