diff --git a/HISTORY.md b/HISTORY.md
index 3549ac182c..ac07ec355d 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -3,22 +3,22 @@
 
 # not yet published, version 6.6.2
 
-- Run the build script during npm `prepare`, so you can use the library 
+- Run the build script during npm `prepare`, so you can use the library
   directly when installing directly from git. Thanks @cinderblock.
 
 
 # 2020-02-26, version 6.6.1
 
 - Fix #1725: simplify `a/(b/c)`. Thanks @dbramwell.
-- Fix examples in documentation of `row` and `column`. 
+- Fix examples in documentation of `row` and `column`.
 
 
 # 2020-02-01, version 6.6.0
 
 - Implemented function `eigs`, see #1705, #542 #1175. Thanks @arkajitmandal.
-- Fixed #1727: validate matrix size when creating a `DenseMatrix` using 
+- Fixed #1727: validate matrix size when creating a `DenseMatrix` using
   `fromJSON`.
-- Fixed `DenseMatrix.map` copying the size and datatype from the original 
+- Fixed `DenseMatrix.map` copying the size and datatype from the original
   matrix instead of checking the returned dimensions and type of the callback.
 - Add a caret to dependencies (like) `^1.2.3`) to allow downstream updates
   without having to await a new release of mathjs.
@@ -26,7 +26,7 @@
 
 # 2020-01-08, version 6.5.0
 
-- Implemented `baseName` option for `createUnit`, see #1707. 
+- Implemented `baseName` option for `createUnit`, see #1707.
   Thanks @ericman314.