Merge pull request #1815 from leviding/patch-5

Fix minor type error

Author: lex111

2-ui/1-document/11-coordinates/1-find-point-coordinates/solution.md

@@ -1,6 +1,6 @@
 # Outer corners
 
-Outer corners are basically what we get from  [elem.getBoundingClientRect()](https://developer.mozilla.org/en-US/docs/DOM/element.getBoundingClientRect).
+Outer corners are basically what we get from [elem.getBoundingClientRect()](https://developer.mozilla.org/en-US/docs/DOM/element.getBoundingClientRect).
 
 Coordinates of the upper-left corner `answer1` and the bottom-right corner `answer2`: