Update workflow-basics.Rmd (hadley#429)

typo

workflow-basics.Rmd

@@ -1,6 +1,6 @@
 # Workflow: basics
 
-You've now have some experience running R code. I didn't give you many details, but you've obviously figured out the basics, or you would've thrown this book away in frustration! Before we go any further, let's make sure you've got a solid foundation in running R code and, and that you know about some of the most helpful RStudio features.
+You now have some experience running R code. I didn't give you many details, but you've obviously figured out the basics, or you would've thrown this book away in frustration! Before we go any further, let's make sure you've got a solid foundation in running R code and, and that you know about some of the most helpful RStudio features.
 
 ## Coding basics
 
@@ -26,7 +26,7 @@ object_name <- value
 
 When reading that code say "object name gets value" in your head.
 
-You will make lots of assignments and `<-` is a pain to type. Don't be lazy and use `=`: it will work, but it will cause confusion later. Instead, use RStudio's keyboard shortcut: Alt + - (the minus sign). Notice that RStudio automagically surrounds `<-` with spaces, which is a good code formatting practice. Code is miserable to read on a good day, so giveyoureeyesabreak and use spaces.
+You will make lots of assignments and `<-` is a pain to type. Don't be lazy and use `=`: it will work, but it will cause confusion later. Instead, use RStudio's keyboard shortcut: Alt + - (the minus sign). Notice that RStudio automagically surrounds `<-` with spaces, which is a good code formatting practice. Code is miserable to read on a good day, so giveyoureyesabreak and use spaces.
 
 ## What's in a name?
 
@@ -139,7 +139,7 @@ Here you can see all of the objects that you've created.
     training your brain to notice even the tiniest difference will pay off
     when programming.)
     
-1.  Tweak the each of the following R commands so that they run correctly:
+1.  Tweak each of the following R commands so that they run correctly:
 
     ```{r, eval = FALSE}
     library(ggplot2)