diff --git a/strings.Rmd b/strings.Rmd
index 51c974b..dd1f222 100644
--- a/strings.Rmd
+++ b/strings.Rmd
@@ -364,7 +364,7 @@ Note that the precedence of these operators is high, so you can write: `colou?r`
 
 ### Grouping and backreferences
 
-You learned about parentheses earlier as a way to disambiguate complex expression. They do one other special thing: they also define numeric groups that you can refer to with _backreferences_, `\1`, `\2` etc.For example, the following regular expression finds all fruits that have a pair of letters that's repeated.
+You learned about parentheses earlier as a way to disambiguate complex expression. They do one other special thing: they also define numeric groups that you can refer to with _backreferences_, `\1`, `\2` etc. For example, the following regular expression finds all fruits that have a pair of letters that's repeated.
 
 ```{r, cache = FALSE}
 str_view(fruit, "(..)\\1", match = TRUE)
@@ -602,7 +602,7 @@ sentences %>%
 
 #### Exercises
 
-1.   Replace all `/`'s in a string with `\`'s.
+1.   Replace all `/`s in a string with `\`s.
 
 ### Splitting