docs: fix grammar in hop.Rd example comment

R/hop.R

@@ -77,7 +77,7 @@
 #' }
 #'
 #' @examples
-#' # `hop()` let's you manually specify locations to apply `.f` at.
+#' # `hop()` lets you manually specify locations to apply `.f` at.
 #' hop(1:3, .starts = c(1, 3), .stops = 3, ~.x)
 #'
 #' # `hop()`'s start/stop locations are allowed to be out of bounds relative

R/slide-index.R

@@ -133,8 +133,8 @@
 #'
 #' # The first 16 slots are NULL because there is no possible way to
 #' # look back 19 days from the 16th index position and construct a full
-#' # window. But on the 17th index position, `""2019-09-03"`, if we look
-#' # back 19 days we get to `""2019-08-15"`, which is the same value as
+#' # window. But on the 17th index position, `"2019-09-03"`, if we look
+#' # back 19 days we get to `"2019-08-15"`, which is the same value as
 #' # `i[1]` so a full window can be constructed.
 #' df$i[16] - 19 >= df$i[1] # FALSE
 #' df$i[17] - 19 >= df$i[1] # TRUE