Update SemanticDifferences.scalatex

Add whitespace after `,`.

Update AdvancedTechniques.scalatex

Fixes:
* `widhet` to `widget`
* `mousedown` to `mousemove`
* `mousedown` to `mouseup`

1 files changed, 1 insertions, 1 deletions

diff --git a/book/src/main/scalatex/book/indepth/SemanticDifferences.scalatex b/book/src/main/scalatex/book/indepth/SemanticDifferences.scalatex
index ebfd1db..96f3929 100644
--- a/book/src/main/scalatex/book/indepth/SemanticDifferences.scalatex
+++ b/book/src/main/scalatex/book/indepth/SemanticDifferences.scalatex
@@ -1,6 +1,6 @@
 @import BookData._
 @p
-  Although Scala.js tries very hard to maintain compatibility with Scala-JVM, there are some parts where the two platforms differs. This can be roughly grouped into two things: differences in the libraries available,and differences in the language itself. This chapter will cover both of these facets.
+  Although Scala.js tries very hard to maintain compatibility with Scala-JVM, there are some parts where the two platforms differs. This can be roughly grouped into two things: differences in the libraries available, and differences in the language itself. This chapter will cover both of these facets.
 
 @sect{Language Differences}
   @sect{Floats are Doubles}