fix: drawToken: use simple comparison instead of regex

Author: aminya

lib/mixins/canvas-drawer.js

@@ -610,7 +610,6 @@ function updateTokensLayer (tokensLayer, firstRow, lastRow, offscreenFirstRow, o
 
 const emptyLineRegexp = /^\s+$/
 const oneOrMoreWhiteSpaceRegexp = /\s+/
-const whiteSpaceRegexp = /\s/
 
 /**
  * Draws a single token on the given context.
@@ -638,7 +637,7 @@ function drawToken (context, text, color, x, y, charWidth, charHeight, ignoreWhi
     let chars = 0
     for (let j = 0, len = text.length; j < len; j++) {
       const char = text[j]
-      if (whiteSpaceRegexp.test(char)) {
+      if (char === ' ') {
         if (chars > 0) {
           context.fillRect(x - (chars * charWidth), y, chars * charWidth, charHeight)
         }